Defiance Pure Memory Daily 2X Strategy ETF Compounding and Market Volatility Risk [Member] Semiconductor Companies Risk [Member] Technology Companies Risk [Member] Industry Concentration Risk [Member] IPO and De-SPAC Risks [Member] Daily Correlation/Tracking Risk [Member] Leverage Risk [Member] Derivatives Risk [Member] Swap Agreements [Member] Options Contracts [Member] Counterparty Risk [Member] Intra-Day Investment Risk [Member] Fixed Income Securities Risk [Member] Rebalancing 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] Liquidity Risk [Member] Focused Portfolio Risk [Member] Economic and Market Risk [Member] Foreign Securities Risk [Member] Depositary Receipt Risk [Member] High Portfolio Turnover Risk [Member] Tracking Error Risk [Member] Illiquid Security Risks [Member] Market Capitalization Risks [Member] Large-Capitalization Investing [Member] Mid-Capitalization Investing [Member] Small-Capitalization Investing [Member] Models and Data Risk [Member] Management Risk [Member] Money Market Instrument Risk [Member] New Fund Risk [Member] Operational Risk [Member] Thematic Qualification Risk [Member] U.S. Government and U.S. Agency Obligations Risk [Member] Tax Risk [Member] Defiance Pure Memory Daily 2X Strategy ETF [Member] Defiance Pure Memory Daily 2X Strategy ETF Defiance Pure Memory Daily 2X Strategy ETF Tax Risk. U.S. Government and U.S. Agency Obligations Risk. Thematic Qualification Risk. Operational Risk. New Fund Risk. Money Market Instrument Risk. Management Risk. Models and Data Risk. Small-Capitalization Investing. Mid-Capitalization Investing. Large-Capitalization Investing. Market Capitalization Risks. Illiquid Security Risks. Tracking Error Risk. High Portfolio Turnover Risk. Depositary Receipt Risk. Foreign Securities Risk. Economic and Market Risk. Focused Portfolio Risk. Liquidity 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 Concentration Risk. ETF Risks. Rebalancing Risk. Fixed Income Securities Risk. Intra-Day Investment Risk. Counterparty Risk. Options Contracts. Swap Agreements. Derivatives Risk. Leverage Risk. Daily Correlation/Tracking Risk. IPO and De-SPAC Risks. Industry Concentration Risk. Semiconductor Companies Risk. Technology Companies Risk. Compounding and Market Volatility Risk.