Defiance Daily 2X Long Brazil ETF Reference Asset Risks [Member] Indirect Investment in Reference Asset Risk [Member] Reference Asset Performance Risk [Member] Brazil Investing Risk [Member] Emerging Markets Securities Risk [Member] Market Capitalization Risk [Member] Foreign Securities Risk [Member] Financial Services Industry Risk [Member] Single Issuer Risk [Member] Compounding and Market Volatility Risk [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] Economic and Market 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] High Portfolio Turnover Risk [Member] Tracking Error Risk [Member] Liquidity Risks [Member] Money Market Instrument Risk [Member] New Fund Risk [Member] Trading Halt Risk [Member] Operational Risk [Member] U.S. Government and U.S. Agency Obligations Risk [Member] Tax Risk [Member] Defiance Daily 2X Long Israel ETF Israel Investing Risk [Member] Technology Industry Risk [Member] Health Care Industry Risk [Member] Defiance Daily 2X Long South Korea ETF South Korea Investing Risk [Member] Industrials Risk [Member] Defiance Daily 2X Long Taiwan ETF Taiwan Investing Risk [Member] Semiconductors & Semiconductor Equipment Industry Risk [Member] Defiance Daily 2X Long Brazil ETF [Member] Defiance Daily 2X Long Israel ETF [Member] Defiance Daily 2X Long South Korea ETF [Member] Defiance Daily 2X Long Taiwan ETF [Member] Defiance Daily 2X Long Brazil ETF. Defiance Daily 2X Long Brazil ETF. Defiance Daily 2X Long Israel ETF. Defiance Daily 2X Long Israel ETF. Defiance Daily 2X Long South Korea ETF. Defiance Daily 2X Long South Korea ETF. Defiance Daily 2X Long Taiwan ETF. Defiance Daily 2X Long Taiwan ETF. Tax Risk. Operational Risk. Trading Halt Risk. New Fund Risk. Money Market Instrument Risk. Liquidity Risk. Tracking Error 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 Concentration Risk. ETF Risks. Economic and Market Risk. Rebalancing Risk. Fixed Income Securities Risk. Intra-Day Investment Risk. Counterparty Risk. Options Contracts. Swap Agreements. Derivatives Risk. Leverage Risk. Compounding and Market Volatility Risk. Indirect Investment in Reference Asset Risk. Reference Asset Risks. Single Issuer Risk. Market Capitalization Risk. Reference Asset Performance Risk. Brazil Investing Risk. Emerging Markets Securities Risk. Foreign Securities Risk. Financial Services Industry Risk. Daily Correlation/Tracking Risk. Liquidity Risks. U.S. Government and U.S. Agency Obligations Risk. Israel Investing Risk. Technology Industry Risk. Health Care Industry Risk. South Korea Investing Risk. Industrials Risk. Taiwan Investing Risk. Semiconductors & Semiconductor Equipment Industry Risk.