Defiance Daily Target 2X Long AMPX ETF AMPX Risks [Member] Indirect Investment in AMPX Risk [Member] AMPX Trading Risk [Member] AMPX Performance Risk [Member] AMPX Operational and Regulatory Risk [Member] Battery Market Competition Risk [Member] Technology Sector Risk [Member] Electrical Equipment 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] 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] Economic and Market 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 Target 2X Long BEAT ETF BEAT Risks [Member] Indirect Investment in BEAT Risk [Member] BEAT Trading Risk [Member] BEAT Performance Risk [Member] BEAT Operations and Regulatory Risk [Member] Healthcare Equipment and Supplies Industry Risk [Member] Defiance Daily Target 2X Long KOPN ETF KOPN Risks [Member] Indirect Investment in KOPN Risk [Member] KOPN Trading Risk [Member] KOPN Performance Risk [Member] KOPN Operations and Regulatory Risk [Member] Aerospace & Defense Industry Risk [Member] Defiance Daily Target 2X Long LTRX ETF LTRX Risks [Member] Indirect Investment in LTRX Risk [Member] LTRX Trading Risk [Member] LTRX Performance Risk [Member] LTRX Operational and Regulatory Risk [Member] Key Customers Risk [Member] Communications Equipment Industry Risk [Member] Defiance Daily Target 2X Long OSS ETF OSS Risks [Member] Indirect Investment in OSS Risk [Member] OSS Trading Risk [Member] OSS Performance Risk [Member] OSS Operations and Regulatory Risk [Member] Technology Hardware, Storage & Peripherals Industry Risk [Member] Defiance Daily Target 2X Long VELO ETF VELO Risks [Member] Indirect Investment in VELO Risk [Member] VELO Trading Risk [Member] VELO Performance Risk [Member] VELO Operations and Regulatory Risk [Member] Industrials Sector Risk [Member] Machinery Industry Risk [Member] Defiance Daily Target 2X Long REKR ETF REKR Risks [Member] Indirect Investment in REKR Risk [Member] REKR Trading Risk [Member] REKR Performance Risk [Member] REKR Operations and Regulatory Risk [Member] Software Industry Risk [Member] Defiance Daily Target 2X Long YALL ETF YALL Risks [Member] Management Risk [Member] Equity Market Risk [Member] Political Criteria Risk [Member] Market Capitalization Risk [Member] Large-Capitalization Investing [Member] Mid-Capitalization Investing [Member] Small-Capitalization Investing [Member] Cyber Security Risk [Member] Defiance Daily Target 2X Long YSS ETF YSS Risks [Member] Indirect Investment in YSS Risk [Member] YSS Trading Risk [Member] YSS Performance Risk [Member] YSS Operational and Regulatory Risk [Member] Concentrated Customer Base Risk [Member] Newly Public Company and Stock Volatility Risk [Member] Defiance Daily Target 2X Long AMPX ETF [Member] Defiance Daily Target 2X Long BEAT ETF [Member] Defiance Daily Target 2X Long KOPN ETF [Member] Defiance Daily Target 2X Long LTRX ETF [Member] Defiance Daily Target 2X Long OSS ETF [Member] Defiance Daily Target 2X Long VELO ETF [Member] Defiance Daily Target 2X Long REKR ETF [Member] Defiance Daily Target 2X Long YALL ETF [Member] Defiance Daily Target 2X Long YSS ETF [Member] Defiance Daily Target 2X Long AMPX ETF. Defiance Daily Target 2X Long AMPX ETF [Member] Defiance Daily Target 2X Long BEAT ETF. Defiance Daily Target 2X Long BEAT ETF [Member] Defiance Daily Target 2X Long KOPN ETF. Defiance Daily Target 2X Long KOPN ETF [Member] Defiance Daily Target 2X Long LTRX ETF. Defiance Daily Target 2X Long LTRX ETF [Member] Defiance Daily Target 2X Long OSS ETF. Defiance Daily Target 2X Long OSS ETF [Member] Defiance Daily Target 2X Long REKR ETF. Defiance Daily Target 2X Long REKR ETF [Member] Defiance Daily Target 2X Long VELO ETF. Defiance Daily Target 2X Long VELO ETF [Member] Defiance Daily Target 2X Long YALL ETF. Defiance Daily Target 2X Long YALL ETF [Member] Defiance Daily Target 2X Long YSS ETF. Defiance Daily Target 2X Long YSS ETF [Member] Tax Risk. U.S. Government and U.S. Agency Obligations Risk. Operational Risk. Trading Halt Risk. New Fund Risk. Money Market Instrument Risk. Liquidity Risk. Tracking Error Risk. High Portfolio Turnover Risk. Economic and Market 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. Compounding and Market Volatility Risk. Single Issuer Risk. Newly Public Company and Stock Volatility Risk. Aerospace & Defense Industry Risk. Technology Sector Risk. Concentrated Customer Base Risk. YSS Operational and Regulatory Risk. YSS Performance Risk. YSS Trading Risk. Indirect Investment in YSS Risk. YSS Risks. Cyber Security Risk. Small-Capitalization Investing. Mid-Capitalization Investing. Large-Capitalization Investing. Market Capitalization Risk. Political Criteria Risk. Equity Market Risk. Management Risk. YALL Risks. Machinery Industry Risk. Industrials Sector Risk. VELO Operations and Regulatory Risk. VELO Performance Risk. VELO Trading Risk. Indirect Investment in VELO Risk. VELO Risks. Software Industry Risk. REKR Operations and Regulatory Risk. REKR Performance Risk. REKR Trading Risk. Indirect Investment in REKR Risk. REKR Risks. Technology Hardware, Storage & Peripherals Industry Risk. OSS Operations and Regulatory Risk. OSS Performance Risk. OSS Trading Risk. Indirect Investment in OSS Risk. OSS Risks. Communications Equipment Industry Risk. Key Customers Risk. LTRX Operational and Regulatory Risk. LTRX Performance Risk. LTRX Trading Risk. Indirect Investment in LTRX Risk. LTRX Risks. KOPN Operations and Regulatory Risk. KOPN Performance Risk. KOPN Trading Risk. Indirect Investment in KOPN Risk. KOPN Risks. Healthcare Equipment and Supplies Industry Risk. BEAT Operations and Regulatory Risk. BEAT Performance Risk. BEAT Trading Risk. Indirect Investment in BEAT Risk. BEAT Risks. Electrical Equipment Industry Risk. Battery Market Competition Risk. AMPX Operational and Regulatory Risk. AMPX Performance Risk. AMPX Trading Risk. Indirect Investment in AMPX Risk. AMPX Risks. Liquidity Risks.