VistaShares Bitcoin Treasury Income ETF Index Strategy Risks [Member] Equity Market Risk [Member] Bitcoin Treasury Companies Risk [Member] Digital Assets Risk [Member] Digital Asset Markets Risk [Member] Blockchain Technology Risk [Member] Derivatives Risk [Member] Options Contracts [Member] Swap Agreements [Member] Counterparty Risk [Member] Concentration Risk [Member] Software Industry Risk [Member] Economic and Market Risk [Member] ETF Risks [Member] Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk [Member] Costs of Buying or Selling Shares [Member] Shares May Trade at Prices Other Than NAV [Member] Trading [Member] Focused Portfolio Risk [Member] Foreign Securities Risk [Member] Depositary Receipt Risk [Member] High Portfolio Turnover Risk [Member] Inflation Risk [Member] Management Risk [Member] Market Capitalization Risk [Member] Large-Capitalization Investing [Member] Mid-Capitalization Investing [Member] Small-Capitalization Investing [Member] New Fund Risk [Member] Newer Sub-Adviser Risk [Member] New Index Risk [Member] Operational Risk [Member] Tax Risk [Member] U.S. Government and U.S. Agency Obligations Risk [Member] VistaShares Ethereum Treasury Income ETF Ethereum Treasury Companies Risk [Member] VistaShares Ethereum Treasury ETF VistaShares IPO and Income ETF IPO Risk [Member] VistaShares Bitcoin Treasury Income ETF [Member] VistaShares Ethereum Treasury Income ETF [Member] VistaShares Ethereum Treasury ETF [Member] VistaShares IPO and Income ETF [Member] VistaShares Bitcoin Treasury Income ETF VistaShares Bitcoin Treasury Income ETF [Member] VistaShares Ethereum Treasury Income ETF VistaShares Ethereum Treasury Income ETF [Member] VistaShares Ethereum Treasury ETF VistaShares Ethereum Treasury ETF [Member] VistaShares IPO and Income ETF VistaShares IPO and Income ETF [Member] U.S. Government and U.S. Agency Obligations Risk. Tax Risk. Operational Risk. Newer Sub-Adviser Risk. New Fund Risk. Small-Capitalization Investing. Mid-Capitalization Investing. Large-Capitalization Investing. Market Capitalization Risk. Management Risk. Inflation Risk. High Portfolio Turnover Risk. Depositary Receipt Risk. Foreign Securities Risk. Focused Portfolio Risk. Trading. Shares May Trade at Prices Other Than NAV. Costs of Buying or Selling Shares. Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. ETF Risks. Economic and Market Risk. Counterparty Risk. Swap Agreements. Options Contracts. Derivatives Risk. IPO Risk. Equity Market Risk. New Index Risk. Software Industry Risk. Concentration Risk. Blockchain Technology Risk. Digital Asset Markets Risk. Digital Assets Risk. Ethereum Treasury Companies Risk. Index Strategy Risks. Bitcoin Treasury Companies Risk.