3.24.3 html 259 80 1 true 70 0 false 2 false false R1.htm 000001 - Document - Document and Entity Information Sheet http://www.ark.com/20241120/role/DocumentAndEntityInformation Document and Entity Information Risk/Return 1 false true R2.htm 020000 - Document - Risk/Return Summary {Unlabeled} - ARK Innovation ETF Sheet http://www.ark.com/20241120/role/DocumentRiskReturnSummaryUnlabeledARKInnovationETF Risk/Return Summary- ARK Innovation ETF Risk/Return 2 false false R8.htm 020006 - Disclosure - Risk/Return Detail Data {Elements} - ARK Innovation ETF Sheet http://www.ark.com/20241120/role/DisclosureRiskReturnDetailDataElementsARKInnovationETF Risk/Return Detail Data- ARK Innovation ETF Risk/Return 3 false true R9.htm 020007 - Document - Risk/Return Summary {Unlabeled} - ARK Next Generation Internet ETF Sheet http://www.ark.com/20241120/role/DocumentRiskReturnSummaryUnlabeledARKNextGenerationInternetETF Risk/Return Summary- ARK Next Generation Internet ETF Risk/Return 4 false false R15.htm 020013 - Disclosure - Risk/Return Detail Data {Elements} - ARK Next Generation Internet ETF Sheet http://www.ark.com/20241120/role/DisclosureRiskReturnDetailDataElementsARKNextGenerationInternetETF Risk/Return Detail Data- ARK Next Generation Internet ETF Risk/Return 5 false true R16.htm 020014 - Document - Risk/Return Summary {Unlabeled} - ARK Fintech Innovation ETF Sheet http://www.ark.com/20241120/role/DocumentRiskReturnSummaryUnlabeledARKFintechInnovationETF Risk/Return Summary- ARK Fintech Innovation ETF Risk/Return 6 false false R22.htm 020020 - Disclosure - Risk/Return Detail Data {Elements} - ARK Fintech Innovation ETF Sheet http://www.ark.com/20241120/role/DisclosureRiskReturnDetailDataElementsARKFintechInnovationETF Risk/Return Detail Data- ARK Fintech Innovation ETF Risk/Return 7 false true R23.htm 020021 - Document - Risk/Return Summary {Unlabeled} - ARK Genomic Revolution ETF Sheet http://www.ark.com/20241120/role/DocumentRiskReturnSummaryUnlabeledARKGenomicRevolutionETF Risk/Return Summary- ARK Genomic Revolution ETF Risk/Return 8 false false R29.htm 020027 - Disclosure - Risk/Return Detail Data {Elements} - ARK Genomic Revolution ETF Sheet http://www.ark.com/20241120/role/DisclosureRiskReturnDetailDataElementsARKGenomicRevolutionETF Risk/Return Detail Data- ARK Genomic Revolution ETF Risk/Return 9 false true R30.htm 020028 - Document - Risk/Return Summary {Unlabeled} - ARK Autonomous Technology & Robotics ETF Sheet http://www.ark.com/20241120/role/DocumentRiskReturnSummaryUnlabeledARKAutonomousTechnologyRoboticsETF Risk/Return Summary- ARK Autonomous Technology & Robotics ETF Risk/Return 10 false false R36.htm 020034 - Disclosure - Risk/Return Detail Data {Elements} - ARK Autonomous Technology & Robotics ETF Sheet http://www.ark.com/20241120/role/DisclosureRiskReturnDetailDataElementsARKAutonomousTechnologyRoboticsETF Risk/Return Detail Data- ARK Autonomous Technology & Robotics ETF Risk/Return 11 false true R37.htm 020035 - Document - Risk/Return Summary {Unlabeled} - ARK Space Exploration & Innovation ETF Sheet http://www.ark.com/20241120/role/DocumentRiskReturnSummaryUnlabeledARKSpaceExplorationInnovationETF Risk/Return Summary- ARK Space Exploration & Innovation ETF Risk/Return 12 false false R43.htm 020041 - Disclosure - Risk/Return Detail Data {Elements} - ARK Space Exploration & Innovation ETF Sheet http://www.ark.com/20241120/role/DisclosureRiskReturnDetailDataElementsARKSpaceExplorationInnovationETF Risk/Return Detail Data- ARK Space Exploration & Innovation ETF Risk/Return 13 false true R44.htm 020042 - Document - Risk/Return Summary {Unlabeled} - The 3D Printing ETF Sheet http://www.ark.com/20241120/role/DocumentRiskReturnSummaryUnlabeledThe3DPrintingETF Risk/Return Summary- The 3D Printing ETF Risk/Return 14 false false R50.htm 020048 - Disclosure - Risk/Return Detail Data {Elements} - The 3D Printing ETF Sheet http://www.ark.com/20241120/role/DisclosureRiskReturnDetailDataElementsThe3DPrintingETF Risk/Return Detail Data- The 3D Printing ETF Risk/Return 15 false true R51.htm 020049 - Document - Risk/Return Summary {Unlabeled} - ARK Israel Innovative Technology ETF Sheet http://www.ark.com/20241120/role/DocumentRiskReturnSummaryUnlabeledARKIsraelInnovativeTechnologyETF Risk/Return Summary- ARK Israel Innovative Technology ETF Risk/Return 16 false false R57.htm 020055 - Disclosure - Risk/Return Detail Data {Elements} - ARK Israel Innovative Technology ETF Sheet http://www.ark.com/20241120/role/DisclosureRiskReturnDetailDataElementsARKIsraelInnovativeTechnologyETF Risk/Return Detail Data- ARK Israel Innovative Technology ETF Risk/Return 17 false false All Reports Book All Reports ck0001579982-20241120.xsd ck0001579982-20241120_cal.xml ck0001579982-20241120_def.xml ck0001579982-20241120_lab.xml ck0001579982-20241120_pre.xml ea0221544-01_485bpos.htm tarklogo.jpg tbarchart_001.jpg tbarchart_002.jpg tbarchart_003.jpg tbarchart_004.jpg tbarchart_005.jpg tbarchart_006.jpg tbarchart_007.jpg tbarchart_008.jpg BarChart1.png BarChart2.png BarChart3.png BarChart4.png BarChart5.png BarChart6.png BarChart7.png BarChart8.png BarChart1.png BarChart2.png BarChart3.png BarChart4.png BarChart5.png BarChart6.png BarChart7.png BarChart8.png http://xbrl.sec.gov/dei/2023 http://xbrl.sec.gov/rr/2023 true true