REX FANG & Innovation Equity Premium Income ETF Industry Concentration Risk [Member] Derivatives Risk [Member] Options Contracts [Member] Counterparty Risk [Member] Price Participation Risk [Member] Distribution Risk [Member] NAV Erosion Risk Due to Distributions [Member] Call Writing Strategy Risk [Member] FLEX Options Risk [Member] Technology Industry Risk [Member] Cyber Security Risk [Member] ETF Risks [Member] Authorized Participants, Market Makers, and Liquidity Providers Limitation Risk [Member] Cash Redemption Risk [Member] Costs of Buying or Selling Shares [Member] Shares May Trade at Prices Other Than NAV [Member] Trading [Member] High Portfolio Turnover Risk [Member] Inflation Risk [Member] Liquidity Risk [Member] Money Market Instrument Risk [Member] Operational Risk [Member] Economic and Market Events Risk [Member] Tax Risk [Member] U.S. Government and U.S. Agency Obligations Risk [Member] REX FANG & Innovation Equity Premium Income ETF [Member] S&P 500 Index (reflects no deduction for fees, expenses, or taxes) REX FANG & Innovation Equity Premium Income ETF REX FANG & Innovation Equity Premium Income ETF [Member] U.S. Government and U.S. Agency Obligations Risk. Tax Risk. Economic and Market Events Risk. Operational Risk. Money Market Instrument Risk. Liquidity Risk. Inflation Risk. High Portfolio Turnover Risk. Trading. Shares May Trade at Prices Other Than NAV. Costs of Buying or Selling Shares. Cash Redemption Risk. Authorized Participants, Market Makers, and Liquidity Providers Limitation Risk. ETF Risks. Cyber Security Risk. Technology Industry Risk. FLEX Options Risk. Call Writing Strategy Risk. NAV Erosion Risk Due to Distributions. Distribution Risk. Price Participation Risk. Counterparty Risk. Options Contracts. Derivatives Risk. Industry Concentration Risk. S&P 500 Index (reflects no deduction for fees, expenses, or taxes)