{
 "version": "2.2",
 "instance": {
  "ck0001540305-20260227.htm": {
   "nsprefix": "ck0001540305",
   "nsuri": "http://usbank.com/20260227",
   "dts": {
    "inline": {
     "local": [
      "ck0001540305-20260227.htm"
     ]
    },
    "schema": {
     "local": [
      "ck0001540305-20260227.xsd"
     ],
     "remote": [
      "http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xl-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xlink-2003-12-31.xsd",
      "http://www.xbrl.org/2005/xbrldt-2005.xsd",
      "http://www.xbrl.org/2006/ref-2006-02-27.xsd",
      "http://www.xbrl.org/lrr/arcrole/deprecated-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/net-2009-12-16.xsd",
      "https://www.xbrl.org/2020/extensible-enumerations-2.0.xsd",
      "https://www.xbrl.org/dtr/type/2020-01-21/types.xsd",
      "https://www.xbrl.org/dtr/type/2024-01-31/types.xsd",
      "https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd",
      "https://xbrl.fasb.org/srt/2025/elts/srt-roles-2025.xsd",
      "https://xbrl.fasb.org/srt/2025/elts/srt-types-2025.xsd",
      "https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd",
      "https://xbrl.fasb.org/us-gaap/2025/elts/us-roles-2025.xsd",
      "https://xbrl.fasb.org/us-gaap/2025/elts/us-types-2025.xsd",
      "https://xbrl.sec.gov/country/2025/country-2025.xsd",
      "https://xbrl.sec.gov/country/2025/country-2025_def.xsd",
      "https://xbrl.sec.gov/dei/2025/dei-2025.xsd",
      "https://xbrl.sec.gov/oef/2025/oef-2025.xsd",
      "https://xbrl.sec.gov/oef/2025/oef-2025_cal.xsd",
      "https://xbrl.sec.gov/oef/2025/oef-2025_lab.xsd",
      "https://xbrl.sec.gov/oef/2025/oef-rr-2025.xsd",
      "https://xbrl.sec.gov/stpr/2025/stpr-2025.xsd"
     ]
    },
    "definitionLink": {
     "local": [
      "ck0001540305-20260227_def.xml"
     ]
    },
    "labelLink": {
     "local": [
      "ck0001540305-20260227_lab.xml"
     ]
    },
    "presentationLink": {
     "local": [
      "ck0001540305-20260227_pre.xml"
     ]
    }
   },
   "keyStandard": 67,
   "keyCustom": 0,
   "axisStandard": 4,
   "axisCustom": 0,
   "memberStandard": 3,
   "memberCustom": 127,
   "hidden": {
    "total": 25,
    "http://xbrl.sec.gov/oef/2025": 21,
    "http://xbrl.sec.gov/dei/2025": 4
   },
   "contextCount": 353,
   "entityCount": 1,
   "segmentCount": 130,
   "elementCount": 300,
   "unitCount": 2,
   "baseTaxonomies": {
    "http://xbrl.sec.gov/oef/2025": 752,
    "http://xbrl.sec.gov/dei/2025": 6
   },
   "report": {
    "R1": {
     "role": "http://xbrl.sec.gov/rr/role/N1aCover",
     "longName": "010000 - Disclosure - Form N-1A Cover",
     "shortName": "Form N-1A Cover",
     "isDefault": "true",
     "groupType": "disclosure",
     "subGroupType": "",
     "menuCat": "Risk/Return",
     "order": "1",
     "firstAnchor": {
      "contextRef": "c-1",
      "name": "dei:EntityInvCompanyType",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "ck0001540305-20260227.htm",
      "first": true,
      "unique": true
     },
     "uniqueAnchor": {
      "contextRef": "c-1",
      "name": "dei:EntityInvCompanyType",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "ck0001540305-20260227.htm",
      "first": true,
      "unique": true
     }
    },
    "R2": {
     "role": "http://xbrl.sec.gov/rr/role/RiskReturn",
     "longName": "010002 - Disclosure - Investment Objectives and Goals",
     "shortName": "Investment Objectives and Goals",
     "isDefault": "false",
     "groupType": "disclosure",
     "subGroupType": "",
     "menuCat": "Risk/Return",
     "order": "2",
     "firstAnchor": {
      "contextRef": "c-2",
      "name": "oef:RiskReturnHeading",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "span",
       "div",
       "oef:ObjectivePrimaryTextBlock",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "ck0001540305-20260227.htm",
      "first": true,
      "unique": true
     },
     "uniqueAnchor": {
      "contextRef": "c-2",
      "name": "oef:RiskReturnHeading",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "span",
       "div",
       "oef:ObjectivePrimaryTextBlock",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "ck0001540305-20260227.htm",
      "first": true,
      "unique": true
     }
    },
    "R3": {
     "role": "http://xbrl.sec.gov/rr/role/FeesAndExpenses",
     "longName": "010003 - Disclosure - Fees and Expenses",
     "shortName": "Fees and Expenses",
     "isDefault": "false",
     "groupType": "disclosure",
     "subGroupType": "",
     "menuCat": "Risk/Return",
     "order": "3",
     "firstAnchor": {
      "contextRef": "c-2",
      "name": "oef:ExpenseHeading",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "ck0001540305-20260227.htm",
      "first": true,
      "unique": true
     },
     "uniqueAnchor": {
      "contextRef": "c-2",
      "name": "oef:ExpenseHeading",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "ck0001540305-20260227.htm",
      "first": true,
      "unique": true
     }
    },
    "R4": {
     "role": "http://xbrl.sec.gov/rr/role/InvestmentStrategy",
     "longName": "010004 - Disclosure - Investment Strategy",
     "shortName": "Investment Strategy",
     "isDefault": "false",
     "groupType": "disclosure",
     "subGroupType": "",
     "menuCat": "Risk/Return",
     "order": "4",
     "firstAnchor": {
      "contextRef": "c-2",
      "name": "oef:StrategyHeading",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "ck0001540305-20260227.htm",
      "first": true,
      "unique": true
     },
     "uniqueAnchor": {
      "contextRef": "c-2",
      "name": "oef:StrategyHeading",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "ck0001540305-20260227.htm",
      "first": true,
      "unique": true
     }
    },
    "R5": {
     "role": "http://xbrl.sec.gov/rr/role/InvestmentRisks",
     "longName": "010005 - Disclosure - Investment Risks",
     "shortName": "Investment Risks",
     "isDefault": "false",
     "groupType": "disclosure",
     "subGroupType": "",
     "menuCat": "Risk/Return",
     "order": "5",
     "firstAnchor": {
      "contextRef": "c-5",
      "name": "oef:RiskTextBlock",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "ck0001540305-20260227.htm",
      "first": true,
      "unique": true
     },
     "uniqueAnchor": {
      "contextRef": "c-5",
      "name": "oef:RiskTextBlock",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "ck0001540305-20260227.htm",
      "first": true,
      "unique": true
     }
    },
    "R6": {
     "role": "http://xbrl.sec.gov/rr/role/PerformanceManagement",
     "longName": "010006 - Disclosure - Performance Management",
     "shortName": "Performance Management",
     "isDefault": "false",
     "groupType": "disclosure",
     "subGroupType": "",
     "menuCat": "Risk/Return",
     "order": "6",
     "firstAnchor": {
      "contextRef": "c-2",
      "name": "oef:BarChartAndPerformanceTableHeading",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "ck0001540305-20260227.htm",
      "first": true,
      "unique": true
     },
     "uniqueAnchor": {
      "contextRef": "c-2",
      "name": "oef:BarChartAndPerformanceTableHeading",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "ck0001540305-20260227.htm",
      "first": true,
      "unique": true
     }
    },
    "R7": {
     "role": "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
     "longName": "020020 - Disclosure - Annual Fund Operating Expenses",
     "shortName": "Annual Fund Operating Expenses",
     "isDefault": "false",
     "groupType": "disclosure",
     "subGroupType": "",
     "menuCat": "Risk/Return",
     "order": "7",
     "firstAnchor": {
      "contextRef": "c-3",
      "name": "oef:ManagementFeesOverAssets",
      "unitRef": "number",
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": "4",
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "ck0001540305-20260227.htm",
      "first": true,
      "unique": true
     },
     "uniqueAnchor": {
      "contextRef": "c-3",
      "name": "oef:ManagementFeesOverAssets",
      "unitRef": "number",
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": "4",
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "ck0001540305-20260227.htm",
      "first": true,
      "unique": true
     }
    },
    "R8": {
     "role": "http://xbrl.sec.gov/rr/role/ExpenseExample",
     "longName": "020030 - Disclosure - Expense Example",
     "shortName": "Expense Example",
     "isDefault": "false",
     "groupType": "disclosure",
     "subGroupType": "",
     "menuCat": "Risk/Return",
     "order": "8",
     "firstAnchor": {
      "contextRef": "c-3",
      "name": "oef:ExpenseExampleYear01",
      "unitRef": "usd",
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": "0",
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "ck0001540305-20260227.htm",
      "first": true,
      "unique": true
     },
     "uniqueAnchor": {
      "contextRef": "c-3",
      "name": "oef:ExpenseExampleYear01",
      "unitRef": "usd",
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": "0",
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "ck0001540305-20260227.htm",
      "first": true,
      "unique": true
     }
    },
    "R9": {
     "role": "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
     "longName": "020040 - Disclosure - Expense Example, No Redemption",
     "shortName": "Expense Example, No Redemption",
     "isDefault": "false",
     "groupType": "disclosure",
     "subGroupType": "",
     "menuCat": "Risk/Return",
     "order": "9",
     "firstAnchor": {
      "contextRef": "c-3",
      "name": "oef:ExpenseExampleNoRedemptionYear01",
      "unitRef": "usd",
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": "0",
      "ancestors": [
       "oef:ExpenseExampleYear01",
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "ck0001540305-20260227.htm",
      "first": true,
      "unique": true
     },
     "uniqueAnchor": {
      "contextRef": "c-3",
      "name": "oef:ExpenseExampleNoRedemptionYear01",
      "unitRef": "usd",
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": "0",
      "ancestors": [
       "oef:ExpenseExampleYear01",
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "ck0001540305-20260227.htm",
      "first": true,
      "unique": true
     }
    },
    "R10": {
     "role": "http://xbrl.sec.gov/rr/role/BarChartData",
     "longName": "020050 - Disclosure - Annual Total Returns",
     "shortName": "Annual Total Returns",
     "isDefault": "false",
     "groupType": "disclosure",
     "subGroupType": "",
     "menuCat": "Risk/Return",
     "order": "10",
     "firstAnchor": null,
     "uniqueAnchor": null
    },
    "R11": {
     "role": "http://xbrl.sec.gov/rr/role/PerformanceTableData",
     "longName": "020060 - Disclosure - Average Annual Total Returns",
     "shortName": "Average Annual Total Returns",
     "isDefault": "false",
     "groupType": "disclosure",
     "subGroupType": "",
     "menuCat": "Risk/Return",
     "order": "11",
     "firstAnchor": {
      "contextRef": "c-28",
      "name": "oef:AverageAnnualReturnLabel",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "ck0001540305-20260227.htm",
      "first": true,
      "unique": true
     },
     "uniqueAnchor": {
      "contextRef": "c-28",
      "name": "oef:AverageAnnualReturnLabel",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "ck0001540305-20260227.htm",
      "first": true,
      "unique": true
     }
    }
   },
   "tag": {
    "ck0001540305_AAMLowDurationPreferredAndIncomeSecuritiesETFBlendedIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "AAMLowDurationPreferredAndIncomeSecuritiesETFBlendedIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "AAM Low Duration Preferred and Income Securities ETF Blended Index (reflects no deduction for fees, expenses, or taxes)",
        "documentation": "AAM Low Duration Preferred and Income Securities ETF Blended Index (reflects no deduction for fees, expenses, or taxes)"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_ADRRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "ADRRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "ADR Risk Member",
        "documentation": "ADR Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "oef_AcquiredFundFeesAndExpensesBasedOnEstimates": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "AcquiredFundFeesAndExpensesBasedOnEstimates",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Acquired Fund Fees and Expenses, Based on Estimates [Text]"
       }
      }
     },
     "auth_ref": [
      "r28"
     ]
    },
    "oef_AcquiredFundFeesAndExpensesOverAssets": {
     "xbrltype": "nonNegativePure4ItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "AcquiredFundFeesAndExpensesOverAssets",
     "calculation": {
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData": {
       "parentTag": "oef_ExpensesOverAssets",
       "weight": 1.0,
       "order": 5.0
      }
     },
     "presentation": [
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Acquired Fund Fees and Expenses"
       }
      }
     },
     "auth_ref": [
      "r27"
     ]
    },
    "ck0001540305_ActiveManagementRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "ActiveManagementRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Active Management Risk Member",
        "documentation": "Active Management Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "oef_AfterTaxesOnDistributionsAndSalesMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "AfterTaxesOnDistributionsAndSalesMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "After Taxes on Distributions and Sales"
       }
      }
     },
     "auth_ref": [
      "r48"
     ]
    },
    "oef_AfterTaxesOnDistributionsMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "AfterTaxesOnDistributionsMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "After Taxes on Distributions"
       }
      }
     },
     "auth_ref": [
      "r48"
     ]
    },
    "ck0001540305_AgencyDebtRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "AgencyDebtRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Agency Debt Risk Member",
        "documentation": "Agency Debt Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "oef_AllCoregistrantsMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "AllCoregistrantsMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData",
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses",
      "http://xbrl.sec.gov/rr/role/InvestmentRisks",
      "http://xbrl.sec.gov/rr/role/InvestmentStrategy",
      "http://xbrl.sec.gov/rr/role/N1aCover",
      "http://xbrl.sec.gov/rr/role/N1aSupplement",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceManagement",
      "http://xbrl.sec.gov/rr/role/PerformanceTableData",
      "http://xbrl.sec.gov/rr/role/RiskReturn",
      "http://xbrl.sec.gov/rr/role/ShareholderFeesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "All Coregistrants [Member]"
       }
      }
     },
     "auth_ref": [
      "r1"
     ]
    },
    "oef_AllRisksMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "AllRisksMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "All Risks [Member]"
       }
      }
     },
     "auth_ref": [
      "r37"
     ]
    },
    "dei_AmendmentDescription": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "AmendmentDescription",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/N1aCover"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Amendment Description",
        "documentation": "Description of changes contained within amended document."
       }
      }
     },
     "auth_ref": []
    },
    "dei_AmendmentFlag": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "AmendmentFlag",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/N1aCover"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Amendment Flag",
        "documentation": "Boolean flag that is true when the XBRL content amends previously-filed or accepted submission."
       }
      }
     },
     "auth_ref": []
    },
    "oef_AnnlRtrPct": {
     "xbrltype": "pureItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "AnnlRtrPct",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Annual Return [Percent]"
       }
      }
     },
     "auth_ref": [
      "r44"
     ]
    },
    "oef_AnnualFundOperatingExpensesTableTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "AnnualFundOperatingExpensesTableTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Annual Fund Operating Expenses [Table]"
       }
      }
     },
     "auth_ref": [
      "r34"
     ]
    },
    "oef_AnnualReturnCaption": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "AnnualReturnCaption",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Annual Return Caption [Text]"
       }
      }
     },
     "auth_ref": [
      "r46"
     ]
    },
    "oef_AnnualReturnColumnName": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "AnnualReturnColumnName",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Annual Return, Column [Optional Text]"
       }
      }
     },
     "auth_ref": [
      "r45"
     ]
    },
    "oef_AnnualReturnInceptionDate": {
     "xbrltype": "dateItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "AnnualReturnInceptionDate",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Annual Return, Inception Date"
       }
      }
     },
     "auth_ref": [
      "r44"
     ]
    },
    "oef_AverageAnnualReturnAbstract": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "AverageAnnualReturnAbstract",
     "lang": {
      "en-us": {
       "role": {
        "label": "Average Annual Return:"
       }
      }
     },
     "auth_ref": [
      "r48"
     ]
    },
    "oef_AverageAnnualReturnCaption": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "AverageAnnualReturnCaption",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Average Annual Return, Caption [Optional Text]"
       }
      }
     },
     "auth_ref": [
      "r48"
     ]
    },
    "oef_AverageAnnualReturnColumnName": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "AverageAnnualReturnColumnName",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Average Annual Return, Column Name [Optional Text]"
       }
      }
     },
     "auth_ref": [
      "r48"
     ]
    },
    "oef_AverageAnnualReturnLabel": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "AverageAnnualReturnLabel",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Average Annual Return, Label [Optional Text]"
       }
      }
     },
     "auth_ref": [
      "r48"
     ]
    },
    "oef_AvgAnnlRtrPct": {
     "xbrltype": "percentItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "AvgAnnlRtrPct",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Average Annual Return, Percent"
       }
      }
     },
     "auth_ref": [
      "r9"
     ]
    },
    "ck0001540305_BankLoansRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "BankLoansRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Bank Loans Risk Member",
        "documentation": "Bank Loans Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "oef_BarChartAndPerformanceTableHeading": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "BarChartAndPerformanceTableHeading",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Bar Chart and Performance Table [Heading]"
       }
      }
     },
     "auth_ref": [
      "r42"
     ]
    },
    "oef_BarChartClosingTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "BarChartClosingTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Bar Chart Closing [Text Block]"
       }
      }
     },
     "auth_ref": [
      "r44"
     ]
    },
    "oef_BarChartDoesNotReflectSalesLoads": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "BarChartDoesNotReflectSalesLoads",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Bar Chart Does Not Reflect Sales Loads [Text]"
       }
      }
     },
     "auth_ref": [
      "r44"
     ]
    },
    "oef_BarChartFootnotesTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "BarChartFootnotesTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Bar Chart Footnotes [Text Block]"
       }
      }
     },
     "auth_ref": [
      "r49"
     ]
    },
    "oef_BarChartHeading": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "BarChartHeading",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Bar Chart [Heading]"
       }
      }
     },
     "auth_ref": [
      "r44"
     ]
    },
    "oef_BarChartHighestQuarterlyReturn": {
     "xbrltype": "pureItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "BarChartHighestQuarterlyReturn",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Highest Quarterly Return"
       }
      }
     },
     "auth_ref": [
      "r44"
     ]
    },
    "oef_BarChartHighestQuarterlyReturnDate": {
     "xbrltype": "dateItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "BarChartHighestQuarterlyReturnDate",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Highest Quarterly Return, Date"
       }
      }
     },
     "auth_ref": [
      "r44"
     ]
    },
    "oef_BarChartLowestQuarterlyReturn": {
     "xbrltype": "pureItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "BarChartLowestQuarterlyReturn",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Lowest Quarterly Return"
       }
      }
     },
     "auth_ref": [
      "r44"
     ]
    },
    "oef_BarChartLowestQuarterlyReturnDate": {
     "xbrltype": "dateItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "BarChartLowestQuarterlyReturnDate",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Lowest Quarterly Return, Date"
       }
      }
     },
     "auth_ref": [
      "r44"
     ]
    },
    "oef_BarChartNarrativeTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "BarChartNarrativeTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Bar Chart Narrative [Text Block]"
       }
      }
     },
     "auth_ref": [
      "r44"
     ]
    },
    "oef_BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "BarChartReasonSelectedClassDifferentFromImmediatelyPrecedingPeriod",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Bar Chart, Reason Selected Class Different from Immediately Preceding Period [Text]"
       }
      }
     },
     "auth_ref": [
      "r47"
     ]
    },
    "oef_BarChartReturnsForClassNotOfferedInProspectus": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "BarChartReturnsForClassNotOfferedInProspectus",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Bar Chart, Returns for Class Not Offered in Prospectus [Text]"
       }
      }
     },
     "auth_ref": [
      "r46"
     ]
    },
    "oef_BarChartTableAbstract": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "BarChartTableAbstract",
     "lang": {
      "en-us": {
       "role": {
        "label": "Bar Chart Table:"
       }
      }
     },
     "auth_ref": [
      "r44"
     ]
    },
    "oef_BarChartTableTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "BarChartTableTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Bar Chart [Table]"
       }
      }
     },
     "auth_ref": [
      "r44"
     ]
    },
    "oef_BarChartYearToDateReturn": {
     "xbrltype": "pureItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "BarChartYearToDateReturn",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Bar Chart, Year to Date Return"
       }
      }
     },
     "auth_ref": [
      "r44"
     ]
    },
    "oef_BarChartYearToDateReturnDate": {
     "xbrltype": "dateItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "BarChartYearToDateReturnDate",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Bar Chart, Year to Date Return, Date"
       }
      }
     },
     "auth_ref": [
      "r44"
     ]
    },
    "ck0001540305_Bloomberg13YearUSGovernmentCreditReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "Bloomberg13YearUSGovernmentCreditReflectsNoDeductionForFeesExpensesOrTaxesIndexMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Bloomberg 1-3 Year US Government/Credit\u2028(reflects no deduction for fees, expenses, or taxes)",
        "documentation": "Bloomberg 1-3 Year US Government/Credit\u2028(reflects no deduction for fees, expenses, or taxes)"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_BloombergU.S.AggregateBondIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "BloombergU.S.AggregateBondIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Bloomberg U.S. Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes)",
        "documentation": "Bloomberg U.S. Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes)"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_C000194426Member": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "C000194426Member",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData",
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "AAM S&amp;P 500 High Dividend Value ETF Class",
        "documentation": "S000059242 AAM S&amp;P 500 High Dividend Value ETF C000194426 AAM S&amp;P 500 High Dividend Value ETF SPDV"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_C000215601Member": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "C000215601Member",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData",
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "AAM Low Duration Preferred and Income Securities ETF Class",
        "documentation": "S000066987 AAM Low Duration Preferred and Income Securities ETF C000215601 AAM Low Duration Preferred and Income Securities ETF PFLD"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_C000236534Member": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "C000236534Member",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData",
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "AAM Transformers ETF Class",
        "documentation": "S000076555 AAM Transformers ETF C000236534 AAM Transformers ETF TRFM"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_C000251381Member": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "C000251381Member",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData",
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "AAM BRENTVIEW DIVIDEND GROWTH ETF Class",
        "documentation": "S000085981 AAM BRENTVIEW DIVIDEND GROWTH ETF C000251381 AAM BRENTVIEW DIVIDEND GROWTH ETF BDIV"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_C000251382Member": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "C000251382Member",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData",
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "AAM SAWGRASS U.S. SMALL CAP QUALITY GROWTH ETF Class",
        "documentation": "S000085982 AAM SAWGRASS U.S. SMALL CAP QUALITY GROWTH ETF C000251382 AAM SAWGRASS U.S. SMALL CAP QUALITY GROWTH ETF SAWS"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_C000251383Member": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "C000251383Member",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData",
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "AAM SAWGRASS U.S. LARGE CAP QUALITY GROWTH ETF Class",
        "documentation": "S000085983 AAM SAWGRASS U.S. LARGE CAP QUALITY GROWTH ETF C000251383 AAM SAWGRASS U.S. LARGE CAP QUALITY GROWTH ETF SAWG"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_C000255346Member": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "C000255346Member",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData",
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "AAM SLC Low Duration Income ETF Class",
        "documentation": "S000088945 AAM SLC Low Duration Income ETF C000255346 AAM SLC Low Duration Income ETF LODI"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_C000261974Member": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "C000261974Member",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "AAM Todd International Intrinsic Value ETF Class",
        "documentation": "S000093585 AAM Todd International Intrinsic Value ETF C000261974 AAM Todd International Intrinsic Value ETF TIIV"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_C000264617Member": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "C000264617Member",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "AAM Crescent CLO ETF Class",
        "documentation": "S000095835 AAM Crescent CLO ETF C000264617 AAM Crescent CLO ETF CLOC"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_CLOLeverageRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "CLOLeverageRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "CLO Leverage Risk Member",
        "documentation": "CLO Leverage Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_CLOManagerRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "CLOManagerRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "CLO Manager Risk Member",
        "documentation": "CLO Manager Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_CLORiskCovenantLiteLoansRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "CLORiskCovenantLiteLoansRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "CLO Risk, Covenant Lite Loans Risk Member",
        "documentation": "CLO Risk, Covenant Lite Loans Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_CLORiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "CLORiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "CLO Risk Member",
        "documentation": "CLO Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_CLORiskMezzanineCLORiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "CLORiskMezzanineCLORiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "CLO Risk, Mezzanine CLO Risk Member",
        "documentation": "CLO Risk, Mezzanine CLO Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_CMORiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "CMORiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "CMO Risk Member",
        "documentation": "CMO Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_CallRisk1Member": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "CallRisk1Member",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Call Risk 1 Member",
        "documentation": "Call Risk 1 Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_CapitalControlsAndSanctionsRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "CapitalControlsAndSanctionsRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Capital Controls And Sanctions Risk Member",
        "documentation": "Capital Controls And Sanctions Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_CashAndCashEquivalentsRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "CashAndCashEquivalentsRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Cash And Cash Equivalents Risk Member",
        "documentation": "Cash And Cash Equivalents Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_CashRedemptionRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "CashRedemptionRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Cash Redemption Risk Member",
        "documentation": "Cash Redemption Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "oef_ClassAxis": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ClassAxis",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData",
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses",
      "http://xbrl.sec.gov/rr/role/N1aSupplement",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceManagement",
      "http://xbrl.sec.gov/rr/role/PerformanceTableData",
      "http://xbrl.sec.gov/rr/role/ShareholderFeesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Class [Axis]"
       }
      }
     },
     "auth_ref": [
      "r4"
     ]
    },
    "oef_Component1OtherExpensesOverAssets": {
     "xbrltype": "nonNegativePure4ItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "Component1OtherExpensesOverAssets",
     "calculation": {
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData": {
       "parentTag": "oef_OtherExpensesOverAssets",
       "weight": 1.0,
       "order": 1.0
      }
     },
     "presentation": [
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Component1 Other Expenses"
       }
      }
     },
     "auth_ref": [
      "r22"
     ]
    },
    "oef_Component2OtherExpensesOverAssets": {
     "xbrltype": "nonNegativePure4ItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "Component2OtherExpensesOverAssets",
     "calculation": {
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData": {
       "parentTag": "oef_OtherExpensesOverAssets",
       "weight": 1.0,
       "order": 2.0
      }
     },
     "presentation": [
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Component2 Other Expenses"
       }
      }
     },
     "auth_ref": [
      "r22"
     ]
    },
    "oef_Component3OtherExpensesOverAssets": {
     "xbrltype": "nonNegativePure4ItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "Component3OtherExpensesOverAssets",
     "calculation": {
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData": {
       "parentTag": "oef_OtherExpensesOverAssets",
       "weight": 1.0,
       "order": 3.0
      }
     },
     "presentation": [
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Component3 Other Expenses"
       }
      }
     },
     "auth_ref": [
      "r22"
     ]
    },
    "ck0001540305_ConcentrationRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "ConcentrationRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Concentration Risk Member",
        "documentation": "Concentration Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "oef_CoregistrantAxis": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "CoregistrantAxis",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData",
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses",
      "http://xbrl.sec.gov/rr/role/InvestmentRisks",
      "http://xbrl.sec.gov/rr/role/InvestmentStrategy",
      "http://xbrl.sec.gov/rr/role/N1aCover",
      "http://xbrl.sec.gov/rr/role/N1aSupplement",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceManagement",
      "http://xbrl.sec.gov/rr/role/PerformanceTableData",
      "http://xbrl.sec.gov/rr/role/RiskReturn",
      "http://xbrl.sec.gov/rr/role/ShareholderFeesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Coregistrant [Axis]"
       }
      }
     },
     "auth_ref": [
      "r1"
     ]
    },
    "ck0001540305_CovenantLiteLoansRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "CovenantLiteLoansRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Covenant Lite Loans Risk Member",
        "documentation": "Covenant Lite Loans Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_CreditRisk1Member": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "CreditRisk1Member",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Credit Risk 1 Member",
        "documentation": "Credit Risk 1 Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_CurrencyExchangeRateRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "CurrencyExchangeRateRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Currency Exchange Rate Risk Member",
        "documentation": "Currency Exchange Rate Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_DebtSecuritiesRiskCallRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "DebtSecuritiesRiskCallRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Debt Securities Risk, Call Risk Member",
        "documentation": "Debt Securities Risk, Call Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_DebtSecuritiesRiskCreditRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "DebtSecuritiesRiskCreditRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Debt Securities Risk, Credit Risk Member",
        "documentation": "Debt Securities Risk, Credit Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_DebtSecuritiesRiskExtensionRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "DebtSecuritiesRiskExtensionRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Debt Securities Risk, Extension Risk Member",
        "documentation": "Debt Securities Risk, Extension Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_DebtSecuritiesRiskFloatingRateObligationsRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "DebtSecuritiesRiskFloatingRateObligationsRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Debt Securities Risk, Floating Rate Obligations Risk Member",
        "documentation": "Debt Securities Risk, Floating Rate Obligations Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_DebtSecuritiesRiskInterestRateRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "DebtSecuritiesRiskInterestRateRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Debt Securities Risk, Interest Rate Risk Member",
        "documentation": "Debt Securities Risk, Interest Rate Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_DebtSecuritiesRiskLiquidityRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "DebtSecuritiesRiskLiquidityRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Debt Securities Risk, Liquidity Risk Member",
        "documentation": "Debt Securities Risk, Liquidity Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_DebtSecuritiesRiskLoanPrepaymentRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "DebtSecuritiesRiskLoanPrepaymentRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Debt Securities Risk, Loan Prepayment Risk Member",
        "documentation": "Debt Securities Risk, Loan Prepayment Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_DebtSecuritiesRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "DebtSecuritiesRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Debt Securities Risk Member",
        "documentation": "Debt Securities Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_DepositaryReceiptRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "DepositaryReceiptRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Depositary Receipt Risk Member",
        "documentation": "Depositary Receipt Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "oef_DistributionAndService12b1FeesOverAssets": {
     "xbrltype": "nonNegativePure4ItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "DistributionAndService12b1FeesOverAssets",
     "calculation": {
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData": {
       "parentTag": "oef_ExpensesOverAssets",
       "weight": 1.0,
       "order": 2.0
      }
     },
     "presentation": [
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Distribution and Service (12b-1) Fees"
       }
      }
     },
     "auth_ref": [
      "r19"
     ]
    },
    "oef_DistributionOrSimilarNon12b1FeesOverAssets": {
     "xbrltype": "nonNegativePure4ItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "DistributionOrSimilarNon12b1FeesOverAssets",
     "calculation": {
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData": {
       "parentTag": "oef_ExpensesOverAssets",
       "weight": 1.0,
       "order": 3.0
      }
     },
     "presentation": [
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Distribution or Similar (Non 12b-1) Fees"
       }
      }
     },
     "auth_ref": [
      "r19"
     ]
    },
    "ck0001540305_DividendPayingSecuritiesRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "DividendPayingSecuritiesRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Dividend-Paying Securities Risk Member",
        "documentation": "Dividend-Paying Securities Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "dei_DocumentDomain": {
     "xbrltype": "domainItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "DocumentDomain",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData",
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses",
      "http://xbrl.sec.gov/rr/role/InvestmentRisks",
      "http://xbrl.sec.gov/rr/role/InvestmentStrategy",
      "http://xbrl.sec.gov/rr/role/N1aCover",
      "http://xbrl.sec.gov/rr/role/N1aSupplement",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceManagement",
      "http://xbrl.sec.gov/rr/role/PerformanceTableData",
      "http://xbrl.sec.gov/rr/role/RiskReturn",
      "http://xbrl.sec.gov/rr/role/ShareholderFeesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Prospectus",
        "documentation": "Type of the document as assigned by the filer, corresponding to SEC document naming convention standards."
       }
      }
     },
     "auth_ref": []
    },
    "dei_DocumentInformationDocumentAxis": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "DocumentInformationDocumentAxis",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData",
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses",
      "http://xbrl.sec.gov/rr/role/InvestmentRisks",
      "http://xbrl.sec.gov/rr/role/InvestmentStrategy",
      "http://xbrl.sec.gov/rr/role/N1aCover",
      "http://xbrl.sec.gov/rr/role/N1aSupplement",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceManagement",
      "http://xbrl.sec.gov/rr/role/PerformanceTableData",
      "http://xbrl.sec.gov/rr/role/RiskReturn",
      "http://xbrl.sec.gov/rr/role/ShareholderFeesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Document [Axis]",
        "documentation": "The axis of a table defines the relationship between the domain members or categories in the table and the line items or concepts that complete the table."
       }
      }
     },
     "auth_ref": []
    },
    "dei_DocumentPeriodEndDate": {
     "xbrltype": "dateItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "DocumentPeriodEndDate",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/N1aCover"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Document Period End Date",
        "documentation": "For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD."
       }
      }
     },
     "auth_ref": []
    },
    "dei_DocumentType": {
     "xbrltype": "submissionTypeItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "DocumentType",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/N1aCover"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Document Type",
        "documentation": "The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'."
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_ETFRisksAuthorizedParticipantsMarketMakersAndLiquidityProvidersConcentrationRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "ETFRisksAuthorizedParticipantsMarketMakersAndLiquidityProvidersConcentrationRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "ETF Risks, Authorized Participants, Market Makers And Liquidity Providers Concentration Risk Member",
        "documentation": "ETF Risks, Authorized Participants, Market Makers And Liquidity Providers Concentration Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_ETFRisksCashRedemptionRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "ETFRisksCashRedemptionRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "ETF Risks, Cash Redemption Risk Member",
        "documentation": "ETF Risks, Cash Redemption Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_ETFRisksCostsOfBuyingOrSellingSharesRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "ETFRisksCostsOfBuyingOrSellingSharesRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "ETF Risks, Costs Of Buying Or Selling Shares Risk Member",
        "documentation": "ETF Risks, Costs Of Buying Or Selling Shares Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_ETFRisksEarlyCloseTradingHaltRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "ETFRisksEarlyCloseTradingHaltRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "ETF Risks, Early Close/Trading Halt Risk Member",
        "documentation": "ETF Risks, Early Close/Trading Halt Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_ETFRisksListingStandardsRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "ETFRisksListingStandardsRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "ETF Risks, Listing Standards Risk Member",
        "documentation": "ETF Risks, Listing Standards Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_ETFRisksMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "ETFRisksMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "ETF Risks Member",
        "documentation": "ETF Risks Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_ETFRisksSharesMayTradeAtPricesOtherThanNAVRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "ETFRisksSharesMayTradeAtPricesOtherThanNAVRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "ETF Risks, Shares May Trade At Prices Other Than NAV Risk Member",
        "documentation": "ETF Risks, Shares May Trade At Prices Other Than NAV Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_ETFRisksTradingRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "ETFRisksTradingRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "ETF Risks, Trading Risk Member",
        "documentation": "ETF Risks, Trading Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_EmergingMarketsRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "EmergingMarketsRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Emerging Markets Risk Member",
        "documentation": "Emerging Markets Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityCentralIndexKey": {
     "xbrltype": "centralIndexKeyItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityCentralIndexKey",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/N1aCover"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Central Index Key",
        "documentation": "A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK."
       }
      }
     },
     "auth_ref": [
      "r0"
     ]
    },
    "dei_EntityDomain": {
     "xbrltype": "domainItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityDomain",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData",
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses",
      "http://xbrl.sec.gov/rr/role/InvestmentRisks",
      "http://xbrl.sec.gov/rr/role/InvestmentStrategy",
      "http://xbrl.sec.gov/rr/role/N1aSupplement",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceManagement",
      "http://xbrl.sec.gov/rr/role/RiskReturn",
      "http://xbrl.sec.gov/rr/role/ShareholderFeesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Series",
        "documentation": "All the names of the entities being reported upon in a document. Any legal structure used to conduct activities or to hold assets. Some examples of such structures are corporations, partnerships, limited liability companies, grantor trusts, and other trusts. This item does not include business and geographical segments which are included in the geographical or business segments domains."
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityInvCompanyType": {
     "xbrltype": "invCompanyType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityInvCompanyType",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/N1aCover"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Investment Company Type",
        "documentation": "One of: N-1A (Mutual Fund), N-1 (Open-End Separate Account with No Variable Annuities), N-2 (Closed-End Investment Company), N-3 (Separate Account Registered as Open-End Management Investment Company), N-4 (Variable Annuity UIT Separate Account), N-5 (Small Business Investment Company), N-6 (Variable Life UIT Separate Account), S-1 or S-3 (Face Amount Certificate Company), S-6 (UIT, Non-Insurance Product)."
       }
      }
     },
     "auth_ref": [
      "r59"
     ]
    },
    "dei_EntityRegistrantName": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityRegistrantName",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/N1aCover"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Registrant Name",
        "documentation": "The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC."
       }
      }
     },
     "auth_ref": [
      "r0"
     ]
    },
    "ck0001540305_EquityMarketRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "EquityMarketRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Equity Market Risk Member",
        "documentation": "Equity Market Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "oef_ExchangeFee": {
     "xbrltype": "nonNegativeMonetaryItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExchangeFee",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ShareholderFeesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Exchange Fee"
       }
      }
     },
     "auth_ref": [
      "r13"
     ]
    },
    "oef_ExchangeFeeOverRedemption": {
     "xbrltype": "nonNegativePure4ItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExchangeFeeOverRedemption",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ShareholderFeesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Exchange Fee (as a percentage of Amount Redeemed)"
       }
      }
     },
     "auth_ref": [
      "r13"
     ]
    },
    "oef_ExpenseBreakpointDiscounts": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseBreakpointDiscounts",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Breakpoint Discounts [Text]"
       }
      }
     },
     "auth_ref": [
      "r25"
     ]
    },
    "oef_ExpenseBreakpointMinimumInvestmentRequiredAmount": {
     "xbrltype": "monetaryItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseBreakpointMinimumInvestmentRequiredAmount",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Breakpoint, Minimum Investment Required [Amount]"
       }
      }
     },
     "auth_ref": [
      "r12"
     ]
    },
    "oef_ExpenseExampleAbstract": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseExampleAbstract",
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example:"
       }
      }
     },
     "auth_ref": [
      "r30"
     ]
    },
    "oef_ExpenseExampleByYearCaption": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseExampleByYearCaption",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example by, Year, Caption [Text]"
       }
      }
     },
     "auth_ref": [
      "r30"
     ]
    },
    "oef_ExpenseExampleByYearColumnName": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseExampleByYearColumnName",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ExpenseExample"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example, By Year, Column [Optional Text]"
       }
      }
     },
     "auth_ref": [
      "r30"
     ]
    },
    "oef_ExpenseExampleByYearHeading": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseExampleByYearHeading",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example by Year [Heading]"
       }
      }
     },
     "auth_ref": [
      "r30"
     ]
    },
    "oef_ExpenseExampleClosingTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseExampleClosingTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example Closing [Text Block]"
       }
      }
     },
     "auth_ref": [
      "r30"
     ]
    },
    "oef_ExpenseExampleFootnotesTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseExampleFootnotesTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example Footnotes [Text Block]"
       }
      }
     },
     "auth_ref": [
      "r30"
     ]
    },
    "oef_ExpenseExampleHeading": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseExampleHeading",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example [Heading]"
       }
      }
     },
     "auth_ref": [
      "r30"
     ]
    },
    "oef_ExpenseExampleNarrativeTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseExampleNarrativeTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example Narrative [Text Block]"
       }
      }
     },
     "auth_ref": [
      "r30"
     ]
    },
    "oef_ExpenseExampleNoRedemptionAbstract": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseExampleNoRedemptionAbstract",
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example, No Redemption:"
       }
      }
     },
     "auth_ref": [
      "r31"
     ]
    },
    "oef_ExpenseExampleNoRedemptionByYearCaption": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseExampleNoRedemptionByYearCaption",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example, No Redemption, By Year, Caption [Text]"
       }
      }
     },
     "auth_ref": [
      "r31"
     ]
    },
    "oef_ExpenseExampleNoRedemptionByYearColumnName": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseExampleNoRedemptionByYearColumnName",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example, No Redemption, By Year, Column [Optional Text]"
       }
      }
     },
     "auth_ref": [
      "r31"
     ]
    },
    "oef_ExpenseExampleNoRedemptionNarrativeTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseExampleNoRedemptionNarrativeTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example, No Redemption Narrative [Text Block]"
       }
      }
     },
     "auth_ref": [
      "r31"
     ]
    },
    "oef_ExpenseExampleNoRedemptionTableTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseExampleNoRedemptionTableTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example, No Redemption [Table]"
       }
      }
     },
     "auth_ref": [
      "r31"
     ]
    },
    "oef_ExpenseExampleNoRedemptionYear01": {
     "xbrltype": "nonNegativeMonetaryItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseExampleNoRedemptionYear01",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example, No Redemption, 1 Year"
       }
      }
     },
     "auth_ref": [
      "r31"
     ]
    },
    "oef_ExpenseExampleNoRedemptionYear03": {
     "xbrltype": "nonNegativeMonetaryItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseExampleNoRedemptionYear03",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example, No Redemption, 3 Years"
       }
      }
     },
     "auth_ref": [
      "r31"
     ]
    },
    "oef_ExpenseExampleNoRedemptionYear05": {
     "xbrltype": "nonNegativeMonetaryItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseExampleNoRedemptionYear05",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example, No Redemption, 5 Years"
       }
      }
     },
     "auth_ref": [
      "r31"
     ]
    },
    "oef_ExpenseExampleNoRedemptionYear10": {
     "xbrltype": "nonNegativeMonetaryItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseExampleNoRedemptionYear10",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example, No Redemption, 10 Years"
       }
      }
     },
     "auth_ref": [
      "r31"
     ]
    },
    "oef_ExpenseExampleWithRedemptionTableTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseExampleWithRedemptionTableTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example, With Redemption [Table]"
       }
      }
     },
     "auth_ref": [
      "r30"
     ]
    },
    "oef_ExpenseExampleYear01": {
     "xbrltype": "nonNegativeMonetaryItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseExampleYear01",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ExpenseExample"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example, with Redemption, 1 Year"
       }
      }
     },
     "auth_ref": [
      "r30"
     ]
    },
    "oef_ExpenseExampleYear03": {
     "xbrltype": "nonNegativeMonetaryItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseExampleYear03",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ExpenseExample"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example, with Redemption, 3 Years"
       }
      }
     },
     "auth_ref": [
      "r30"
     ]
    },
    "oef_ExpenseExampleYear05": {
     "xbrltype": "nonNegativeMonetaryItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseExampleYear05",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ExpenseExample"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example, with Redemption, 5 Years"
       }
      }
     },
     "auth_ref": [
      "r30"
     ]
    },
    "oef_ExpenseExampleYear10": {
     "xbrltype": "nonNegativeMonetaryItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseExampleYear10",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ExpenseExample"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Example, with Redemption, 10 Years"
       }
      }
     },
     "auth_ref": [
      "r30"
     ]
    },
    "oef_ExpenseFootnotesTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseFootnotesTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Footnotes [Text Block]"
       }
      }
     },
     "auth_ref": [
      "r17"
     ]
    },
    "oef_ExpenseHeading": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseHeading",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Heading [Optional Text]"
       }
      }
     },
     "auth_ref": [
      "r11"
     ]
    },
    "oef_ExpenseNarrativeTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpenseNarrativeTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expense Narrative [Text Block]"
       }
      }
     },
     "auth_ref": [
      "r12"
     ]
    },
    "oef_ExpensesDeferredChargesTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpensesDeferredChargesTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expenses Deferred Charges [Text Block]"
       }
      }
     },
     "auth_ref": [
      "r14"
     ]
    },
    "oef_ExpensesExplanationOfNonrecurringAccountFee": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpensesExplanationOfNonrecurringAccountFee",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expenses Explanation of Nonrecurring Account Fee [Text]"
       }
      }
     },
     "auth_ref": [
      "r16"
     ]
    },
    "oef_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpensesNotCorrelatedToRatioDueToAcquiredFundFees",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]"
       }
      }
     },
     "auth_ref": [
      "r29"
     ]
    },
    "oef_ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpensesOtherExpensesHadExtraordinaryExpensesBeenIncluded",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expenses Other Expenses Had Extraordinary Expenses Been Included [Text]"
       }
      }
     },
     "auth_ref": [
      "r21"
     ]
    },
    "oef_ExpensesOverAssets": {
     "xbrltype": "nonNegativePure4ItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpensesOverAssets",
     "calculation": {
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData": {
       "parentTag": "oef_NetExpensesOverAssets",
       "weight": 1.0,
       "order": 1.0
      }
     },
     "presentation": [
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expenses (as a percentage of Assets)",
        "totalLabel": "Total Expenses"
       }
      }
     },
     "auth_ref": [
      "r23"
     ]
    },
    "oef_ExpensesRangeOfExchangeFeesTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpensesRangeOfExchangeFeesTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expenses Range of Exchange Fees [Text Block]"
       }
      }
     },
     "auth_ref": [
      "r15"
     ]
    },
    "oef_ExpensesRestatedToReflectCurrent": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ExpensesRestatedToReflectCurrent",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Expenses Restated to Reflect Current [Text]"
       }
      }
     },
     "auth_ref": [
      "r24"
     ]
    },
    "ck0001540305_ExtendedSettlementRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "ExtendedSettlementRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Extended Settlement Risk Member",
        "documentation": "Extended Settlement Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_ExtensionRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "ExtensionRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Extension Risk Member",
        "documentation": "Extension Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "oef_FeeWaiverOrReimbursementOverAssets": {
     "xbrltype": "percentItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "FeeWaiverOrReimbursementOverAssets",
     "calculation": {
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData": {
       "parentTag": "oef_NetExpensesOverAssets",
       "weight": 1.0,
       "order": 2.0
      }
     },
     "presentation": [
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Fee Waiver or Reimbursement",
        "negatedLabel": "Fee Waiver or Reimbursement"
       }
      }
     },
     "auth_ref": [
      "r26"
     ]
    },
    "oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "FeeWaiverOrReimbursementOverAssetsDateOfTermination",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Fee Waiver or Reimbursement over Assets, Date of Termination"
       }
      }
     },
     "auth_ref": [
      "r26"
     ]
    },
    "ck0001540305_FixedIncomeSecuritiesRiskCallRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "FixedIncomeSecuritiesRiskCallRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Fixed Income Securities Risk, Call Risk Member",
        "documentation": "Fixed Income Securities Risk, Call Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_FixedIncomeSecuritiesRiskCreditRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "FixedIncomeSecuritiesRiskCreditRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Fixed Income Securities Risk, Credit Risk Member",
        "documentation": "Fixed Income Securities Risk, Credit Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_FixedIncomeSecuritiesRiskDurationRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "FixedIncomeSecuritiesRiskDurationRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Fixed Income Securities Risk, Duration Risk Member",
        "documentation": "Fixed Income Securities Risk, Duration Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_FixedIncomeSecuritiesRiskEventRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "FixedIncomeSecuritiesRiskEventRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Fixed Income Securities Risk, Event Risk Member",
        "documentation": "Fixed Income Securities Risk, Event Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_FixedIncomeSecuritiesRiskExtensionRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "FixedIncomeSecuritiesRiskExtensionRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Fixed Income Securities Risk, Extension Risk Member",
        "documentation": "Fixed Income Securities Risk, Extension Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_FixedIncomeSecuritiesRiskIncomeRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "FixedIncomeSecuritiesRiskIncomeRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Fixed Income Securities Risk, Income Risk Member",
        "documentation": "Fixed Income Securities Risk, Income Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_FixedIncomeSecuritiesRiskInterestRateRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "FixedIncomeSecuritiesRiskInterestRateRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Fixed Income Securities Risk, Interest Rate Risk Member",
        "documentation": "Fixed Income Securities Risk, Interest Rate Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_FixedIncomeSecuritiesRiskLiquidityRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "FixedIncomeSecuritiesRiskLiquidityRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Fixed Income Securities Risk, Liquidity Risk Member",
        "documentation": "Fixed Income Securities Risk, Liquidity Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_FixedIncomeSecuritiesRiskMaturityRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "FixedIncomeSecuritiesRiskMaturityRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Fixed Income Securities Risk, Maturity Risk Member",
        "documentation": "Fixed Income Securities Risk, Maturity Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_FixedIncomeSecuritiesRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "FixedIncomeSecuritiesRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Fixed Income Securities Risk Member",
        "documentation": "Fixed Income Securities Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_FixedIncomeSecuritiesRiskPrepaymentRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "FixedIncomeSecuritiesRiskPrepaymentRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Fixed Income Securities Risk, Prepayment Risk Member",
        "documentation": "Fixed Income Securities Risk, Prepayment Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_FixedIncomeSecuritiesRiskValuationRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "FixedIncomeSecuritiesRiskValuationRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Fixed Income Securities Risk, Valuation Risk Member",
        "documentation": "Fixed Income Securities Risk, Valuation Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_FixedIncomeSecuritiesRiskVariableAndFloatingRateInstrumentRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "FixedIncomeSecuritiesRiskVariableAndFloatingRateInstrumentRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Fixed Income Securities Risk, Variable And Floating Rate Instrument Risk Member",
        "documentation": "Fixed Income Securities Risk, Variable And Floating Rate Instrument Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_ForeignMarketsRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "ForeignMarketsRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Foreign Markets Risk Member",
        "documentation": "Foreign Markets Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_ForeignSecuritiesRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "ForeignSecuritiesRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Foreign Securities Risk Member",
        "documentation": "Foreign Securities Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "oef_FormN1aAbstract": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "FormN1aAbstract",
     "lang": {
      "en-us": {
       "role": {
        "label": "Form N-1A:"
       }
      }
     },
     "auth_ref": [
      "r2"
     ]
    },
    "ck0001540305_GeographicInvestmentRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "GeographicInvestmentRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Geographic Investment Risk Member",
        "documentation": "Geographic Investment Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_GeographicInvestmentRiskRisksRelatedToInvestingInEuropeRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "GeographicInvestmentRiskRisksRelatedToInvestingInEuropeRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Geographic Investment Risk, Risks Related To Investing In Europe Risk Member",
        "documentation": "Geographic Investment Risk, Risks Related To Investing In Europe Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_GeographicInvestmentRiskRisksRelatedToInvestingInJapanRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "GeographicInvestmentRiskRisksRelatedToInvestingInJapanRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Geographic Investment Risk, Risks Related To Investing In Japan Risk Member",
        "documentation": "Geographic Investment Risk, Risks Related To Investing In Japan Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_GeopoliticalRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "GeopoliticalRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Geopolitical Risk Member",
        "documentation": "Geopolitical Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_GovernmentObligationsRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "GovernmentObligationsRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Government Obligations Risk Member",
        "documentation": "Government Obligations Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_GrowthInvestingRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "GrowthInvestingRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Growth Investing Risk Member",
        "documentation": "Growth Investing Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_HighDividendInvestingRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "HighDividendInvestingRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "High Dividend Investing Risk Member",
        "documentation": "High Dividend Investing Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_HighPortfolioTurnoverRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "HighPortfolioTurnoverRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "High Portfolio Turnover Risk Member",
        "documentation": "High Portfolio Turnover Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_HighYieldSecuritiesRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "HighYieldSecuritiesRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "High-Yield Securities Risk Member",
        "documentation": "High-Yield Securities Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "oef_HighestQuarterlyReturnLabel": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "HighestQuarterlyReturnLabel",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Highest Quarterly Return, Label [Optional Text]"
       }
      }
     },
     "auth_ref": [
      "r44"
     ]
    },
    "ck0001540305_HybridSecuritiesRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "HybridSecuritiesRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Hybrid Securities Risk Member",
        "documentation": "Hybrid Securities Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_ICE05YearDurationExchangeListedPreferredandHybridSecuritiesIndexreflectsnodeductionforfeesexpensesortaxesIndexMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "ICE05YearDurationExchangeListedPreferredandHybridSecuritiesIndexreflectsnodeductionforfeesexpensesortaxesIndexMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "ICE 0-5 Year Duration Exchange-Listed Preferred &amp; Hybrid Securities Index (reflects no deduction for fees, expenses, or taxes)",
        "documentation": "ICE 0-5 Year Duration Exchange-Listed Preferred &amp; Hybrid Securities Index (reflects no deduction for fees, expenses, or taxes)"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_ICE05YearDurationPreferredHybridSecuritiesIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "ICE05YearDurationPreferredHybridSecuritiesIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "ICE 0-5 Year Duration Preferred &amp; Hybrid Securities Index (reflects no deduction for fees, expenses, or taxes)",
        "documentation": "ICE 0-5 Year Duration Preferred &amp; Hybrid Securities Index (reflects no deduction for fees, expenses, or taxes)"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_IncomeRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "IncomeRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Income Risk Member",
        "documentation": "Income Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "oef_IndexNoDeductionForFeesExpensesTaxes": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "IndexNoDeductionForFeesExpensesTaxes",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Index No Deduction for Fees, Expenses, or Taxes [Text]"
       }
      }
     },
     "auth_ref": [
      "r48"
     ]
    },
    "ck0001540305_IndexProviderRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "IndexProviderRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Index Provider Risk Member",
        "documentation": "Index Provider Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_InterestRateRisk1Member": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "InterestRateRisk1Member",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Interest Rate Risk 1 Member",
        "documentation": "Interest Rate Risk 1 Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_IssuerSpecificRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "IssuerSpecificRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Issuer-Specific Risk Member",
        "documentation": "Issuer-Specific Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_LargeCapitalizationInvestingRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "LargeCapitalizationInvestingRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Large-Capitalization Investing Risk Member",
        "documentation": "Large-Capitalization Investing Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "dei_LegalEntityAxis": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "LegalEntityAxis",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData",
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses",
      "http://xbrl.sec.gov/rr/role/InvestmentRisks",
      "http://xbrl.sec.gov/rr/role/InvestmentStrategy",
      "http://xbrl.sec.gov/rr/role/N1aSupplement",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceManagement",
      "http://xbrl.sec.gov/rr/role/RiskReturn",
      "http://xbrl.sec.gov/rr/role/ShareholderFeesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Series [Axis]",
        "documentation": "The set of legal entities associated with a report."
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_LiquidityRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "LiquidityRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Liquidity Risk Member",
        "documentation": "Liquidity Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "oef_LowestQuarterlyReturnLabel": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "LowestQuarterlyReturnLabel",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Lowest Quarterly Return, Label [Optional Text]"
       }
      }
     },
     "auth_ref": [
      "r44"
     ]
    },
    "oef_ManagementFeesOverAssets": {
     "xbrltype": "nonNegativePure4ItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ManagementFeesOverAssets",
     "calculation": {
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData": {
       "parentTag": "oef_ExpensesOverAssets",
       "weight": 1.0,
       "order": 1.0
      }
     },
     "presentation": [
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Management Fees (as a percentage of Assets)"
       }
      }
     },
     "auth_ref": [
      "r18"
     ]
    },
    "ck0001540305_ManagementRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "ManagementRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Management Risk Member",
        "documentation": "Management Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_MarketCapitalizationRiskLargeCapitalizationInvestingRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "MarketCapitalizationRiskLargeCapitalizationInvestingRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Market Capitalization Risk, Large-Capitalization Investing Risk Member",
        "documentation": "Market Capitalization Risk, Large-Capitalization Investing Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_MarketCapitalizationRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "MarketCapitalizationRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Market Capitalization Risk Member",
        "documentation": "Market Capitalization Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_MarketCapitalizationRiskMidCapitalizationInvestingMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "MarketCapitalizationRiskMidCapitalizationInvestingMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Market Capitalization Risk, Mid-Capitalization Investing Member",
        "documentation": "Market Capitalization Risk, Mid-Capitalization Investing Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_MarketCapitalizationRiskSmallCapitalizationInvestingMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "MarketCapitalizationRiskSmallCapitalizationInvestingMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Market Capitalization Risk, Small-Capitalization Investing Member",
        "documentation": "Market Capitalization Risk, Small-Capitalization Investing Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_MarketEventsRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "MarketEventsRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Market Events Risk Member",
        "documentation": "Market Events Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "oef_MarketIndexPerformanceTableTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "MarketIndexPerformanceTableTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Market Index Performance [Table]"
       }
      }
     },
     "auth_ref": [
      "r48"
     ]
    },
    "ck0001540305_MarketRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "MarketRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Market Risk Member",
        "documentation": "Market Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "oef_MaximumAccountFee": {
     "xbrltype": "nonNegativeMonetaryItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "MaximumAccountFee",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ShareholderFeesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Maximum Account Fee"
       }
      }
     },
     "auth_ref": [
      "r13"
     ]
    },
    "oef_MaximumAccountFeeOverAssets": {
     "xbrltype": "nonNegativePure4ItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "MaximumAccountFeeOverAssets",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ShareholderFeesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Maximum Account Fee (as a percentage of Assets)"
       }
      }
     },
     "auth_ref": [
      "r13"
     ]
    },
    "oef_MaximumCumulativeSalesChargeOverOfferingPrice": {
     "xbrltype": "nonNegativePure4ItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "MaximumCumulativeSalesChargeOverOfferingPrice",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ShareholderFeesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Maximum Cumulative Sales Charge (as a percentage of Offering Price)"
       }
      }
     },
     "auth_ref": [
      "r13"
     ]
    },
    "oef_MaximumCumulativeSalesChargeOverOther": {
     "xbrltype": "nonNegativePure4ItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "MaximumCumulativeSalesChargeOverOther",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ShareholderFeesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Maximum Cumulative Sales Charge (as a percentage)"
       }
      }
     },
     "auth_ref": [
      "r13"
     ]
    },
    "oef_MaximumDeferredSalesChargeOverOfferingPrice": {
     "xbrltype": "nonNegativePure4ItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "MaximumDeferredSalesChargeOverOfferingPrice",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ShareholderFeesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Maximum Deferred Sales Charge (as a percentage of Offering Price)"
       }
      }
     },
     "auth_ref": [
      "r13"
     ]
    },
    "oef_MaximumDeferredSalesChargeOverOther": {
     "xbrltype": "nonNegativePure4ItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "MaximumDeferredSalesChargeOverOther",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ShareholderFeesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Maximum Deferred Sales Charge (as a percentage)"
       }
      }
     },
     "auth_ref": [
      "r13"
     ]
    },
    "oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice": {
     "xbrltype": "nonNegativePure4ItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "MaximumSalesChargeImposedOnPurchasesOverOfferingPrice",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ShareholderFeesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)"
       }
      }
     },
     "auth_ref": [
      "r13"
     ]
    },
    "oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther": {
     "xbrltype": "nonNegativePure4ItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ShareholderFeesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage)"
       }
      }
     },
     "auth_ref": [
      "r13"
     ]
    },
    "ck0001540305_ModelsAndDataRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "ModelsAndDataRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Models And Data Risk Member",
        "documentation": "Models And Data Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "oef_MoneyMarketSevenDayTaxEquivalentYield": {
     "xbrltype": "pureItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "MoneyMarketSevenDayTaxEquivalentYield",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Money Market Seven Day Tax Equivalent Yield"
       }
      }
     },
     "auth_ref": [
      "r51"
     ]
    },
    "oef_MoneyMarketSevenDayYield": {
     "xbrltype": "pureItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "MoneyMarketSevenDayYield",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Money Market Seven Day Yield"
       }
      }
     },
     "auth_ref": [
      "r51"
     ]
    },
    "oef_MoneyMarketSevenDayYieldCaption": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "MoneyMarketSevenDayYieldCaption",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Money Market Seven Day Yield, Caption [Optional Text]"
       }
      }
     },
     "auth_ref": [
      "r51"
     ]
    },
    "oef_MoneyMarketSevenDayYieldColumnName": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "MoneyMarketSevenDayYieldColumnName",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Money Market Seven Day Yield Column [Optional Text]"
       }
      }
     },
     "auth_ref": [
      "r51"
     ]
    },
    "oef_MoneyMarketSevenDayYieldPhone": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "MoneyMarketSevenDayYieldPhone",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Money Market Seven Day Yield Phone"
       }
      }
     },
     "auth_ref": [
      "r52"
     ]
    },
    "ck0001540305_MortgageAndAssetBackedSecuritiesRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "MortgageAndAssetBackedSecuritiesRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Mortgage- And Asset-Backed Securities Risk Member",
        "documentation": "Mortgage- And Asset-Backed Securities Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "oef_NetExpensesOverAssets": {
     "xbrltype": "nonNegativePure4ItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "NetExpensesOverAssets",
     "calculation": {
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData": {
       "parentTag": null,
       "weight": null,
       "order": null,
       "root": true
      }
     },
     "presentation": [
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Net Expenses (as a percentage of Assets)",
        "totalLabel": "Net Expenses"
       }
      }
     },
     "auth_ref": [
      "r17"
     ]
    },
    "ck0001540305_NewFundRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "NewFundRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "New Fund Risk Member",
        "documentation": "New Fund Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "oef_ObjectiveHeading": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ObjectiveHeading",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/RiskReturn"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Objective [Heading]"
       }
      }
     },
     "auth_ref": [
      "r6"
     ]
    },
    "oef_ObjectivePrimaryTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ObjectivePrimaryTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/RiskReturn"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Objective, Primary [Text Block]"
       }
      }
     },
     "auth_ref": [
      "r6"
     ]
    },
    "oef_ObjectiveSecondaryTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ObjectiveSecondaryTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/RiskReturn"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Objective, Secondary [Text Block]"
       }
      }
     },
     "auth_ref": [
      "r6"
     ]
    },
    "oef_OperatingExpensesCaption": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "OperatingExpensesCaption",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Operating Expenses Caption [Optional Text]"
       }
      }
     },
     "auth_ref": [
      "r17"
     ]
    },
    "oef_OperatingExpensesColumnName": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "OperatingExpensesColumnName",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Operating Expenses Column [Optional Text]"
       }
      }
     },
     "auth_ref": [
      "r17"
     ]
    },
    "oef_OtherExpensesNewFundBasedOnEstimates": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "OtherExpensesNewFundBasedOnEstimates",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Expenses, New Fund, Based on Estimates [Text]"
       }
      }
     },
     "auth_ref": [
      "r33"
     ]
    },
    "oef_OtherExpensesOverAssets": {
     "xbrltype": "nonNegativePure4ItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "OtherExpensesOverAssets",
     "calculation": {
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData": {
       "parentTag": "oef_ExpensesOverAssets",
       "weight": 1.0,
       "order": 4.0
      }
     },
     "presentation": [
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Expenses (as a percentage of Assets):",
        "totalLabel": "Other Expenses"
       }
      }
     },
     "auth_ref": [
      "r20"
     ]
    },
    "ck0001540305_OtherInvestmentCompaniesRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "OtherInvestmentCompaniesRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Other Investment Companies Risk Member",
        "documentation": "Other Investment Companies Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_PassiveInvestmentRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "PassiveInvestmentRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Passive Investment Risk Member",
        "documentation": "Passive Investment Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_PenceTransformersIndexNetTotalReturnReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "PenceTransformersIndexNetTotalReturnReflectsNoDeductionForFeesExpensesOrTaxesIndexMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Pence Transformers Index Net Total Return (reflects no deduction for fees, expenses, or taxes)",
        "documentation": "Pence Transformers Index Net Total Return (reflects no deduction for fees, expenses, or taxes)"
       }
      }
     },
     "auth_ref": []
    },
    "oef_PerfInceptionDate": {
     "xbrltype": "dateItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PerfInceptionDate",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Performance Inception Date"
       }
      }
     },
     "auth_ref": [
      "r7"
     ]
    },
    "oef_PerformanceAdditionalMarketIndex": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PerformanceAdditionalMarketIndex",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Performance Additional Market Index [Text]"
       }
      }
     },
     "auth_ref": [
      "r43"
     ]
    },
    "oef_PerformanceAvailabilityPhone": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PerformanceAvailabilityPhone",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Performance Availability Phone [Text]"
       }
      }
     },
     "auth_ref": [
      "r43"
     ]
    },
    "oef_PerformanceAvailabilityWebSiteAddress": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PerformanceAvailabilityWebSiteAddress",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Performance Availability Website Address [Text]"
       }
      }
     },
     "auth_ref": [
      "r43"
     ]
    },
    "oef_PerformanceInformationIllustratesVariabilityOfReturns": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PerformanceInformationIllustratesVariabilityOfReturns",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Performance Information Illustrates Variability of Returns [Text]"
       }
      }
     },
     "auth_ref": [
      "r43"
     ]
    },
    "oef_PerformanceMeasureAxis": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PerformanceMeasureAxis",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Performance Measure [Axis]"
       }
      }
     },
     "auth_ref": [
      "r48"
     ]
    },
    "oef_PerformanceMeasureDomain": {
     "xbrltype": "domainItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PerformanceMeasureDomain",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Before Taxes"
       }
      }
     },
     "auth_ref": [
      "r48"
     ]
    },
    "oef_PerformanceNarrativeTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PerformanceNarrativeTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Performance Narrative [Text Block]"
       }
      }
     },
     "auth_ref": [
      "r43"
     ]
    },
    "oef_PerformanceOneYearOrLess": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PerformanceOneYearOrLess",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Performance One Year or Less [Text]"
       }
      }
     },
     "auth_ref": [
      "r43"
     ]
    },
    "oef_PerformancePastDoesNotIndicateFuture": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PerformancePastDoesNotIndicateFuture",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Performance Past Does Not Indicate Future [Text]"
       }
      }
     },
     "auth_ref": [
      "r8",
      "r43"
     ]
    },
    "oef_PerformanceTableClosingTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PerformanceTableClosingTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Performance Table Closing [Text Block]"
       }
      }
     },
     "auth_ref": [
      "r48"
     ]
    },
    "oef_PerformanceTableDoesReflectSalesLoads": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PerformanceTableDoesReflectSalesLoads",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Performance Table Does Reflect Sales Loads"
       }
      }
     },
     "auth_ref": [
      "r53"
     ]
    },
    "oef_PerformanceTableExplanationAfterTaxHigher": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PerformanceTableExplanationAfterTaxHigher",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Performance Table Explanation after Tax Higher"
       }
      }
     },
     "auth_ref": [
      "r58"
     ]
    },
    "oef_PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PerformanceTableFootnotesReasonPerformanceInformationForClassDifferentFromImmediatelyPrecedingPeriod",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Performance Table Footnotes, Reason Performance Information for Class Different from Immediately Preceding Period [Text]"
       }
      }
     },
     "auth_ref": [
      "r50"
     ]
    },
    "oef_PerformanceTableFootnotesTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PerformanceTableFootnotesTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Performance Table Footnotes"
       }
      }
     },
     "auth_ref": [
      "r48"
     ]
    },
    "oef_PerformanceTableHeading": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PerformanceTableHeading",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Performance Table Heading"
       }
      }
     },
     "auth_ref": [
      "r48"
     ]
    },
    "oef_PerformanceTableMarketIndexChanged": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PerformanceTableMarketIndexChanged",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Performance Table Market Index Changed"
       }
      }
     },
     "auth_ref": [
      "r55"
     ]
    },
    "oef_PerformanceTableNarrativeTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PerformanceTableNarrativeTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Performance Table Narrative"
       }
      }
     },
     "auth_ref": [
      "r53"
     ]
    },
    "oef_PerformanceTableNotRelevantToTaxDeferred": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PerformanceTableNotRelevantToTaxDeferred",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Performance Table Not Relevant to Tax Deferred"
       }
      }
     },
     "auth_ref": [
      "r57"
     ]
    },
    "oef_PerformanceTableOneClassOfAfterTaxShown": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PerformanceTableOneClassOfAfterTaxShown",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Performance Table One Class of after Tax Shown [Text]"
       }
      }
     },
     "auth_ref": [
      "r48",
      "r54"
     ]
    },
    "oef_PerformanceTableTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PerformanceTableTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Performance [Table]"
       }
      }
     },
     "auth_ref": [
      "r48"
     ]
    },
    "oef_PerformanceTableUsesHighestFederalRate": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PerformanceTableUsesHighestFederalRate",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Performance Table Uses Highest Federal Rate"
       }
      }
     },
     "auth_ref": [
      "r56"
     ]
    },
    "oef_PortfolioTurnoverHeading": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PortfolioTurnoverHeading",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Portfolio Turnover [Heading]"
       }
      }
     },
     "auth_ref": [
      "r32"
     ]
    },
    "oef_PortfolioTurnoverRate": {
     "xbrltype": "pureItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PortfolioTurnoverRate",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Portfolio Turnover, Rate"
       }
      }
     },
     "auth_ref": [
      "r10",
      "r32"
     ]
    },
    "ck0001540305_PortfolioTurnoverRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "PortfolioTurnoverRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Portfolio Turnover Risk Member",
        "documentation": "Portfolio Turnover Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "oef_PortfolioTurnoverTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "PortfolioTurnoverTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Portfolio Turnover [Text Block]"
       }
      }
     },
     "auth_ref": [
      "r32"
     ]
    },
    "ck0001540305_PreferredSecuritiesRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "PreferredSecuritiesRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Preferred Securities Risk Member",
        "documentation": "Preferred Securities Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_PrepaymentRisk1Member": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "PrepaymentRisk1Member",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Prepayment Risk 1 Member",
        "documentation": "Prepayment Risk 1 Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_PrimaryMarketIssuedSecuritiesRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "PrimaryMarketIssuedSecuritiesRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Primary Market Issued Securities Risk Member",
        "documentation": "Primary Market Issued Securities Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_PrivatelyIssuedSecuritiesRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "PrivatelyIssuedSecuritiesRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Privately Issued Securities Risk Member",
        "documentation": "Privately Issued Securities Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "oef_ProspectusDate": {
     "xbrltype": "dateItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ProspectusDate",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/N1aCover"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Prospectus Date"
       }
      }
     },
     "auth_ref": [
      "r5"
     ]
    },
    "oef_ProspectusLineItems": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ProspectusLineItems",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData",
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses",
      "http://xbrl.sec.gov/rr/role/InvestmentRisks",
      "http://xbrl.sec.gov/rr/role/InvestmentStrategy",
      "http://xbrl.sec.gov/rr/role/N1aCover",
      "http://xbrl.sec.gov/rr/role/N1aSupplement",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceManagement",
      "http://xbrl.sec.gov/rr/role/PerformanceTableData",
      "http://xbrl.sec.gov/rr/role/RiskReturn",
      "http://xbrl.sec.gov/rr/role/ShareholderFeesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Prospectus [Line Items]"
       }
      }
     },
     "auth_ref": [
      "r3"
     ]
    },
    "oef_ProspectusTable": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ProspectusTable",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData",
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses",
      "http://xbrl.sec.gov/rr/role/InvestmentRisks",
      "http://xbrl.sec.gov/rr/role/InvestmentStrategy",
      "http://xbrl.sec.gov/rr/role/N1aCover",
      "http://xbrl.sec.gov/rr/role/N1aSupplement",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceManagement",
      "http://xbrl.sec.gov/rr/role/PerformanceTableData",
      "http://xbrl.sec.gov/rr/role/RiskReturn",
      "http://xbrl.sec.gov/rr/role/ShareholderFeesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Prospectus [Table]"
       }
      }
     },
     "auth_ref": [
      "r3"
     ]
    },
    "ck0001540305_REITInvestmentRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "REITInvestmentRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "REIT Investment Risk Member",
        "documentation": "REIT Investment Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "oef_RedemptionFee": {
     "xbrltype": "nonPositiveMonetaryItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "RedemptionFee",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ShareholderFeesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Redemption Fee",
        "negatedLabel": "Redemption Fee"
       }
      }
     },
     "auth_ref": [
      "r13"
     ]
    },
    "oef_RedemptionFeeOverRedemption": {
     "xbrltype": "nonPositivePure4ItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "RedemptionFeeOverRedemption",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ShareholderFeesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Redemption Fee (as a percentage of Amount Redeemed)",
        "negatedLabel": "Redemption Fee (as a percentage of Amount Redeemed)"
       }
      }
     },
     "auth_ref": [
      "r13"
     ]
    },
    "oef_RiskAxis": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "RiskAxis",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Risk [Axis]"
       }
      }
     },
     "auth_ref": [
      "r37"
     ]
    },
    "oef_RiskLoseMoneyMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "RiskLoseMoneyMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Risk Lose Money [Member]"
       }
      }
     },
     "auth_ref": [
      "r36"
     ]
    },
    "oef_RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "RiskMoneyMarketFundMayImposeFeesOrSuspendSalesMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Risk Money Market Fund May Impose Fees or Suspend Sales [Member]"
       }
      }
     },
     "auth_ref": [
      "r38"
     ]
    },
    "oef_RiskMoneyMarketFundMayNotPreserveDollarMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "RiskMoneyMarketFundMayNotPreserveDollarMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Risk Money Market Fund May Not Preserve Dollar [Member]"
       }
      }
     },
     "auth_ref": [
      "r38"
     ]
    },
    "oef_RiskMoneyMarketFundPriceFluctuatesMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "RiskMoneyMarketFundPriceFluctuatesMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Risk Money Market Fund Price Fluctuates [Member]"
       }
      }
     },
     "auth_ref": [
      "r39"
     ]
    },
    "oef_RiskMoneyMarketFundSponsorMayNotProvideSupportMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "RiskMoneyMarketFundSponsorMayNotProvideSupportMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Risk Money Market Fund Sponsor May Not Provide Support [Member]"
       }
      }
     },
     "auth_ref": [
      "r38"
     ]
    },
    "oef_RiskNondiversifiedStatusMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "RiskNondiversifiedStatusMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Risk Nondiversified Status [Member]"
       }
      }
     },
     "auth_ref": [
      "r41"
     ]
    },
    "oef_RiskNotInsuredDepositoryInstitutionMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "RiskNotInsuredDepositoryInstitutionMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Risk Not Insured Depository Institution [Member]"
       }
      }
     },
     "auth_ref": [
      "r40"
     ]
    },
    "oef_RiskNotInsuredMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "RiskNotInsuredMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Risk Not Insured [Member]"
       }
      }
     },
     "auth_ref": [
      "r38"
     ]
    },
    "oef_RiskReturnHeading": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "RiskReturnHeading",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/RiskReturn"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Risk/Return [Heading]"
       }
      }
     },
     "auth_ref": [
      "r60"
     ]
    },
    "oef_RiskTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "RiskTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Risk [Text Block]"
       }
      }
     },
     "auth_ref": [
      "r37"
     ]
    },
    "oef_RisksAbstract": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "RisksAbstract",
     "lang": {
      "en-us": {
       "role": {
        "label": "Risks [Abstract]"
       }
      }
     },
     "auth_ref": [
      "r36"
     ]
    },
    "ck0001540305_Russell1000GrowthTotalReturnIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "Russell1000GrowthTotalReturnIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Russell 1000 Growth Total Return Index (reflects no deduction for fees, expenses, or taxes)",
        "documentation": "Russell 1000 Growth Total Return Index (reflects no deduction for fees, expenses, or taxes)"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_Russell2000GrowthTotalReturnIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "Russell2000GrowthTotalReturnIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Russell 2000 Growth Total Return Index (reflects no deduction for fees, expenses, or taxes)",
        "documentation": "Russell 2000 Growth Total Return Index (reflects no deduction for fees, expenses, or taxes)"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_S000059242Member": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "S000059242Member",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData",
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses",
      "http://xbrl.sec.gov/rr/role/InvestmentRisks",
      "http://xbrl.sec.gov/rr/role/InvestmentStrategy",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceManagement",
      "http://xbrl.sec.gov/rr/role/RiskReturn"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "AAM S&amp;P 500 High Dividend Value ETF",
        "documentation": "S000059242 AAM S&amp;P 500 High Dividend Value ETF C000194426 AAM S&amp;P 500 High Dividend Value ETF SPDV"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_S000066987Member": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "S000066987Member",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData",
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses",
      "http://xbrl.sec.gov/rr/role/InvestmentRisks",
      "http://xbrl.sec.gov/rr/role/InvestmentStrategy",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceManagement",
      "http://xbrl.sec.gov/rr/role/RiskReturn"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "AAM Low Duration Preferred and Income Securities ETF",
        "documentation": "S000066987 AAM Low Duration Preferred and Income Securities ETF C000215601 AAM Low Duration Preferred and Income Securities ETF PFLD"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_S000076555Member": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "S000076555Member",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData",
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses",
      "http://xbrl.sec.gov/rr/role/InvestmentRisks",
      "http://xbrl.sec.gov/rr/role/InvestmentStrategy",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceManagement",
      "http://xbrl.sec.gov/rr/role/RiskReturn"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "AAM Transformers ETF",
        "documentation": "S000076555 AAM Transformers ETF C000236534 AAM Transformers ETF TRFM"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_S000085981Member": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "S000085981Member",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData",
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses",
      "http://xbrl.sec.gov/rr/role/InvestmentRisks",
      "http://xbrl.sec.gov/rr/role/InvestmentStrategy",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceManagement",
      "http://xbrl.sec.gov/rr/role/RiskReturn"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "AAM BRENTVIEW DIVIDEND GROWTH ETF",
        "documentation": "S000085981 AAM BRENTVIEW DIVIDEND GROWTH ETF C000251381 AAM BRENTVIEW DIVIDEND GROWTH ETF BDIV"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_S000085982Member": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "S000085982Member",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData",
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses",
      "http://xbrl.sec.gov/rr/role/InvestmentRisks",
      "http://xbrl.sec.gov/rr/role/InvestmentStrategy",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceManagement",
      "http://xbrl.sec.gov/rr/role/RiskReturn"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "AAM SAWGRASS U.S. SMALL CAP QUALITY GROWTH ETF",
        "documentation": "S000085982 AAM SAWGRASS U.S. SMALL CAP QUALITY GROWTH ETF C000251382 AAM SAWGRASS U.S. SMALL CAP QUALITY GROWTH ETF SAWS"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_S000085983Member": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "S000085983Member",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData",
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses",
      "http://xbrl.sec.gov/rr/role/InvestmentRisks",
      "http://xbrl.sec.gov/rr/role/InvestmentStrategy",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceManagement",
      "http://xbrl.sec.gov/rr/role/RiskReturn"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "AAM SAWGRASS U.S. LARGE CAP QUALITY GROWTH ETF",
        "documentation": "S000085983 AAM SAWGRASS U.S. LARGE CAP QUALITY GROWTH ETF C000251383 AAM SAWGRASS U.S. LARGE CAP QUALITY GROWTH ETF SAWG"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_S000088945Member": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "S000088945Member",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData",
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses",
      "http://xbrl.sec.gov/rr/role/InvestmentRisks",
      "http://xbrl.sec.gov/rr/role/InvestmentStrategy",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceManagement",
      "http://xbrl.sec.gov/rr/role/RiskReturn"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "AAM SLC Low Duration Income ETF",
        "documentation": "S000088945 AAM SLC Low Duration Income ETF C000255346 AAM SLC Low Duration Income ETF LODI"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_S000093585Member": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "S000093585Member",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses",
      "http://xbrl.sec.gov/rr/role/InvestmentRisks",
      "http://xbrl.sec.gov/rr/role/InvestmentStrategy",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceManagement",
      "http://xbrl.sec.gov/rr/role/RiskReturn"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "AAM Todd International Intrinsic Value ETF",
        "documentation": "S000093585 AAM Todd International Intrinsic Value ETF C000261974 AAM Todd International Intrinsic Value ETF TIIV"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_S000095835Member": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "S000095835Member",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses",
      "http://xbrl.sec.gov/rr/role/InvestmentRisks",
      "http://xbrl.sec.gov/rr/role/InvestmentStrategy",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceManagement",
      "http://xbrl.sec.gov/rr/role/RiskReturn"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "AAM Crescent CLO ETF",
        "documentation": "S000095835 AAM Crescent CLO ETF C000264617 AAM Crescent CLO ETF CLOC"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_SP500DividendandFreeCashFlowYieldIndexreflectsnodeductionforfeesexpensesortaxesIndexMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "SP500DividendandFreeCashFlowYieldIndexreflectsnodeductionforfeesexpensesortaxesIndexMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "S&amp;P 500 Dividend and Free Cash Flow Yield Index (reflects no deduction for fees, expenses, or taxes)",
        "documentation": "S&amp;P 500 Dividend and Free Cash Flow Yield Index (reflects no deduction for fees, expenses, or taxes)"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_SP500RIndexreflectsnodeductionforfeesexpensesortaxesIndexMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "SP500RIndexreflectsnodeductionforfeesexpensesortaxesIndexMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "S&amp;P 500\u00ae Index (reflects no deduction for fees, expenses or taxes)",
        "documentation": "S&amp;P 500\u00ae Index (reflects no deduction for fees, expenses or taxes)"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_SP500TRIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "SP500TRIndexReflectsNoDeductionForFeesExpensesOrTaxesIndexMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceTableData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "S&amp;P 500\u00ae TR Index (reflects no deduction for fees, expenses, or taxes)",
        "documentation": "S&amp;P 500\u00ae TR Index (reflects no deduction for fees, expenses, or taxes)"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_SecondaryMarketIssuedSecuritiesRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "SecondaryMarketIssuedSecuritiesRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Secondary Market Issued Securities Risk Member",
        "documentation": "Secondary Market Issued Securities Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_SectorRiskFinancialSectorRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "SectorRiskFinancialSectorRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Sector Risk, Financial Sector Risk Member",
        "documentation": "Sector Risk, Financial Sector Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_SectorRiskHealthCareSectorRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "SectorRiskHealthCareSectorRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Sector Risk, Health Care Sector Risk Member",
        "documentation": "Sector Risk, Health Care Sector Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_SectorRiskIndustrialsSectorRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "SectorRiskIndustrialsSectorRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Sector Risk, Industrials Sector Risk Member",
        "documentation": "Sector Risk, Industrials Sector Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_SectorRiskInformationTechnologySectorRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "SectorRiskInformationTechnologySectorRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Sector Risk, Information Technology Sector Risk Member",
        "documentation": "Sector Risk, Information Technology Sector Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_SectorRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "SectorRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Sector Risk Member",
        "documentation": "Sector Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_SecuritiesLendingRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "SecuritiesLendingRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Securities Lending Risk Member",
        "documentation": "Securities Lending Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "oef_ShareClassDomain": {
     "xbrltype": "domainItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ShareClassDomain",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/BarChartData",
      "http://xbrl.sec.gov/rr/role/ExpenseExample",
      "http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption",
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses",
      "http://xbrl.sec.gov/rr/role/N1aSupplement",
      "http://xbrl.sec.gov/rr/role/OperatingExpensesData",
      "http://xbrl.sec.gov/rr/role/PerformanceManagement",
      "http://xbrl.sec.gov/rr/role/PerformanceTableData",
      "http://xbrl.sec.gov/rr/role/ShareholderFeesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Share Classes"
       }
      }
     },
     "auth_ref": [
      "r4"
     ]
    },
    "oef_ShareholderFeeOther": {
     "xbrltype": "nonNegativeMonetaryItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ShareholderFeeOther",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ShareholderFeesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Shareholder Fee, Other"
       }
      }
     },
     "auth_ref": [
      "r13"
     ]
    },
    "oef_ShareholderFeesAbstract": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ShareholderFeesAbstract",
     "lang": {
      "en-us": {
       "role": {
        "label": "Shareholder Fees:"
       }
      }
     },
     "auth_ref": [
      "r13"
     ]
    },
    "oef_ShareholderFeesCaption": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ShareholderFeesCaption",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Shareholder Fees Caption [Optional Text]"
       }
      }
     },
     "auth_ref": [
      "r13"
     ]
    },
    "oef_ShareholderFeesColumnName": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ShareholderFeesColumnName",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/ShareholderFeesData"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Shareholder Fees Column [Optional Text]"
       }
      }
     },
     "auth_ref": [
      "r13"
     ]
    },
    "oef_ShareholderFeesTableTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ShareholderFeesTableTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/FeesAndExpenses"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Shareholder Fees [Table]"
       }
      }
     },
     "auth_ref": [
      "r13"
     ]
    },
    "oef_StrategyHeading": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "StrategyHeading",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentStrategy"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Strategy [Heading]"
       }
      }
     },
     "auth_ref": [
      "r35"
     ]
    },
    "oef_StrategyNarrativeTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "StrategyNarrativeTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentStrategy"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Strategy Narrative [Text Block]"
       }
      }
     },
     "auth_ref": [
      "r35"
     ]
    },
    "oef_StrategyPortfolioConcentration": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "StrategyPortfolioConcentration",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentStrategy"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Strategy Portfolio Concentration [Text]"
       }
      }
     },
     "auth_ref": [
      "r35"
     ]
    },
    "oef_SupplementToProspectusTextBlock": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "SupplementToProspectusTextBlock",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/N1aSupplement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Supplement to Prospectus [Text Block]"
       }
      }
     },
     "auth_ref": [
      "r2"
     ]
    },
    "oef_ThirtyDayTaxEquivalentYield": {
     "xbrltype": "pureItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ThirtyDayTaxEquivalentYield",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Thirty Day Tax Equivalent Yield"
       }
      }
     },
     "auth_ref": [
      "r52"
     ]
    },
    "oef_ThirtyDayYield": {
     "xbrltype": "pureItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ThirtyDayYield",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Thirty Day Yield"
       }
      }
     },
     "auth_ref": [
      "r52"
     ]
    },
    "oef_ThirtyDayYieldCaption": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ThirtyDayYieldCaption",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Thirty Day Yield Caption [Optional Text]"
       }
      }
     },
     "auth_ref": [
      "r52"
     ]
    },
    "oef_ThirtyDayYieldColumnName": {
     "xbrltype": "textBlockItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ThirtyDayYieldColumnName",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Thirty Day Yield Column [Optional Text]"
       }
      }
     },
     "auth_ref": [
      "r52"
     ]
    },
    "oef_ThirtyDayYieldPhone": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "ThirtyDayYieldPhone",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Thirty Day Yield Phone"
       }
      }
     },
     "auth_ref": [
      "r52"
     ]
    },
    "ck0001540305_TrackingErrorRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "TrackingErrorRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Tracking Error Risk Member",
        "documentation": "Tracking Error Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "ck0001540305_ValuationRiskMember": {
     "xbrltype": "domainItemType",
     "nsuri": "http://usbank.com/20260227",
     "localname": "ValuationRiskMember",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/InvestmentRisks"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Valuation Risk Member",
        "documentation": "Valuation Risk Member"
       }
      }
     },
     "auth_ref": []
    },
    "oef_YearToDateReturnLabel": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/oef/2025",
     "localname": "YearToDateReturnLabel",
     "presentation": [
      "http://xbrl.sec.gov/rr/role/PerformanceManagement"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Year to Date Return, Label [Optional Text]"
       }
      }
     },
     "auth_ref": [
      "r44"
     ]
    }
   }
  }
 },
 "std_ref": {
  "r0": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "12",
   "Subsection": "b-2"
  },
  "r1": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A"
  },
  "r2": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "1"
  },
  "r3": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "1",
   "Subsection": "a"
  },
  "r4": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "1",
   "Subsection": "a",
   "Paragraph": "1"
  },
  "r5": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "1",
   "Subsection": "a",
   "Paragraph": "3"
  },
  "r6": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "2",
   "Subsection": "a"
  },
  "r7": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "27A",
   "Subsection": "d",
   "Paragraph": "2",
   "Subparagraph": "i"
  },
  "r8": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "27A",
   "Subsection": "d",
   "Paragraph": "2",
   "Subparagraph": "iiii",
   "Clause": "A"
  },
  "r9": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "27A",
   "Subsection": "d",
   "Paragraph": "2",
   "Subparagraph": "instruction",
   "Clause": "7"
  },
  "r10": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "27A",
   "Subsection": "e"
  },
  "r11": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "3",
   "Subsection": "instruction",
   "Paragraph": "1"
  },
  "r12": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "3",
   "Subsection": "instruction",
   "Paragraph": "1",
   "Subparagraph": "b"
  },
  "r13": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "3",
   "Subsection": "instruction",
   "Paragraph": "2"
  },
  "r14": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "3",
   "Subsection": "instruction",
   "Paragraph": "2",
   "Subparagraph": "a",
   "Sentence": "i"
  },
  "r15": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "3",
   "Subsection": "instruction",
   "Paragraph": "2",
   "Subparagraph": "c"
  },
  "r16": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "3",
   "Subsection": "instruction",
   "Paragraph": "2",
   "Subparagraph": "d"
  },
  "r17": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "3",
   "Subsection": "instruction",
   "Paragraph": "3"
  },
  "r18": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "3",
   "Subsection": "instruction",
   "Paragraph": "3",
   "Subparagraph": "a"
  },
  "r19": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "3",
   "Subsection": "instruction",
   "Paragraph": "3",
   "Subparagraph": "b"
  },
  "r20": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "3",
   "Subsection": "instruction",
   "Paragraph": "3",
   "Subparagraph": "c",
   "Sentence": "i"
  },
  "r21": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "3",
   "Subsection": "instruction",
   "Paragraph": "3",
   "Subparagraph": "c",
   "Sentence": "ii"
  },
  "r22": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "3",
   "Subsection": "instruction",
   "Paragraph": "3",
   "Subparagraph": "c",
   "Sentence": "iii"
  },
  "r23": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "3",
   "Subsection": "instruction",
   "Paragraph": "3",
   "Subparagraph": "d"
  },
  "r24": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "3",
   "Subsection": "instruction",
   "Paragraph": "3",
   "Subparagraph": "d",
   "Clause": "B",
   "Sentence": "ii"
  },
  "r25": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "3",
   "Subsection": "instruction",
   "Paragraph": "3",
   "Subparagraph": "d",
   "Sentence": "iii"
  },
  "r26": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "3",
   "Subsection": "instruction",
   "Paragraph": "3",
   "Subparagraph": "e"
  },
  "r27": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "3",
   "Subsection": "instruction",
   "Paragraph": "3",
   "Subparagraph": "f",
   "Sentence": "i"
  },
  "r28": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "3",
   "Subsection": "instruction",
   "Paragraph": "3",
   "Subparagraph": "f",
   "Sentence": "vi"
  },
  "r29": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "3",
   "Subsection": "instruction",
   "Paragraph": "3",
   "Subparagraph": "f",
   "Sentence": "vii"
  },
  "r30": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "3",
   "Subsection": "instruction",
   "Paragraph": "4"
  },
  "r31": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "3",
   "Subsection": "instruction",
   "Paragraph": "4",
   "Subparagraph": "f"
  },
  "r32": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "3",
   "Subsection": "instruction",
   "Paragraph": "5"
  },
  "r33": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "3",
   "Subsection": "instruction",
   "Paragraph": "6",
   "Subparagraph": "a"
  },
  "r34": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "3",
   "Subsection": "instrution",
   "Paragraph": "3"
  },
  "r35": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "4",
   "Subsection": "a"
  },
  "r36": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "4",
   "Subsection": "b",
   "Paragraph": "1"
  },
  "r37": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "4",
   "Subsection": "b",
   "Paragraph": "1",
   "Subparagraph": "i",
   "Clause": "instruction"
  },
  "r38": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "4",
   "Subsection": "b",
   "Paragraph": "1",
   "Subparagraph": "ii"
  },
  "r39": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "4",
   "Subsection": "b",
   "Paragraph": "1",
   "Subparagraph": "ii",
   "Clause": "A"
  },
  "r40": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "4",
   "Subsection": "b",
   "Paragraph": "1",
   "Subparagraph": "iii"
  },
  "r41": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "4",
   "Subsection": "b",
   "Paragraph": "1",
   "Subparagraph": "iv"
  },
  "r42": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "4",
   "Subsection": "b",
   "Paragraph": "2"
  },
  "r43": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "4",
   "Subsection": "b",
   "Paragraph": "2",
   "Subparagraph": "i"
  },
  "r44": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "4",
   "Subsection": "b",
   "Paragraph": "2",
   "Subparagraph": "ii"
  },
  "r45": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "4",
   "Subsection": "b",
   "Paragraph": "2",
   "Subparagraph": "ii",
   "Sentence": "instruction",
   "Clause": "1",
   "Subclause": "a"
  },
  "r46": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "4",
   "Subsection": "b",
   "Paragraph": "2",
   "Subparagraph": "ii",
   "Sentence": "instruction",
   "Clause": "3",
   "Subclause": "b"
  },
  "r47": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "4",
   "Subsection": "b",
   "Paragraph": "2",
   "Subparagraph": "ii",
   "Sentence": "instruction",
   "Clause": "3",
   "Subclause": "c"
  },
  "r48": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "4",
   "Subsection": "b",
   "Paragraph": "2",
   "Subparagraph": "iii"
  },
  "r49": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "4",
   "Subsection": "b",
   "Paragraph": "2",
   "Subparagraph": "instruction",
   "Clause": "3"
  },
  "r50": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "4",
   "Subsection": "b",
   "Paragraph": "2",
   "Subparagraph": "instruction",
   "Clause": "3",
   "Subclause": "c"
  },
  "r51": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "4",
   "Subsection": "b",
   "Paragraph": "2",
   "Subparagraph": "instruction",
   "Clause": "a",
   "Sentence": "2"
  },
  "r52": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "4",
   "Subsection": "b",
   "Paragraph": "2",
   "Subparagraph": "instruction",
   "Clause": "d",
   "Sentence": "2"
  },
  "r53": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "4",
   "Subsection": "b",
   "Paragraph": "2",
   "Subparagraph": "iv"
  },
  "r54": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "4",
   "Subsection": "b",
   "Paragraph": "2",
   "Subparagraph": "iv",
   "Clause": "C"
  },
  "r55": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "4",
   "Subsection": "b",
   "Paragraph": "2",
   "Subparagraph": "iv",
   "Clause": "c",
   "Sentence": "2"
  },
  "r56": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "4",
   "Subsection": "b",
   "Paragraph": "2",
   "Subparagraph": "iv",
   "Sentence": "A"
  },
  "r57": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "4",
   "Subsection": "b",
   "Paragraph": "2",
   "Subparagraph": "iv",
   "Sentence": "B"
  },
  "r58": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Form N-1A",
   "Section": "4",
   "Subsection": "b",
   "Paragraph": "2",
   "Subparagraph": "iv",
   "Sentence": "D"
  },
  "r59": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Regulation S-T",
   "Number": "232",
   "Section": "313"
  },
  "r60": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Section": "2",
   "Name": "Form N-1A",
   "Subsection": "a"
  }
 }
}
