Intelligent Real Estate ETF REIT Risk [Member] Real Estate Securities Risk [Member] Mortgage-Related Securities (MBS) Risk [Member] CMBS Risk [Member] RMBS Risk [Member] General Market Risk [Member] Equity Market Risk [Member] Concentration Risk [Member] Debt Securities Risk [Member] Call Risk [Member] Event Risk [Member] Extension Risk [Member] Foreign Securities Risk [Member] ETF Risks [Member] Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk [Member] Cash Redemption Risk [Member] Costs of Buying or Selling Shares [Member] Shares May Trade at Prices Other Than NAV [Member] Trading [Member] Data Risk [Member] Management Risk [Member] Recent Market Events Risk [Member] Sub-Adviser - Potential Conflicts of Interest Risk [Member] Residential REIT ETF Convertible Securities Risk [Member] Derivatives Risk [Member] Swap Agreements Risk [Member] Options Risk [Member] Other Investment Companies Risk [Member] Intelligent Real Estate ETF [Member] Residential REIT ETF [Member] Dow Jones U.S. Select REIT Index (reflects no deduction for fees, expenses or taxes) S&P 500® Total Return Index (reflects no deduction for fees, expenses, or taxes) Intelligent Real Estate ETF. Intelligent Real Estate ETF. Residential REIT ETF. Residential REIT ETF. Dow Jones U.S. Select REIT Index (reflects no deduction for fees, expenses or taxes). S&P 500® Total Return Index (reflects no deduction for fees, expenses, or taxes). REIT Risk. Mortgage-Related Securities (MBS) Risk. Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. Costs of Buying or Selling Shares. Shares May Trade at Prices Other Than NAV. Sub-Adviser - Potential Conflicts of Interest Risk. General Market Risk. Equity Market Risk. Debt Securities Risk. Call Risk. Event Risk. Extension Risk. Real Estate Securities Risk. Concentration Risk. Cash Redemption Risk. Trading. Data Risk. Management Risk. Recent Market Events Risk. Convertible Securities Risk. Derivatives Risk. Swap Agreements Risk. Options Risk. Foreign Securities Risk. Other Investment Companies Risk. ETF Risks. RMBS Risk. CMBS Risk.