VistaShares Target 15 Berkshire Select Income ETF Berkshire Hathaway Management Change [Member] Derivatives Risk [Member] Options [Member] Counterparty Risk [Member] Index / Strategy Risks [Member] Distribution Risk [Member] NAV Decline Risk Due to Distributions [Member] Equity 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] Focused Portfolio 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] Market Events Risk [Member] Newer Fund Risk [Member] Newer Sub-Adviser Risk [Member] Operational Risk [Member] Tax Risk [Member] U.S. Government and U.S. Agency Obligations Risk [Member] VistaShares Target 15 USA Momentum Income ETF Momentum Investing Risk [Member] New Fund Risk [Member] VistaShares Target 15 USA Value Income ETF Value Investing Risk [Member] VistaShares Target 15 USA Quality Income ETF Quality Style Investing Risks [Member] VistaShares Target 15 USA Low Volatility Income ETF Low Volatility Investing Risks [Member] VistaShares Target 15 Berkshire Select Income ETF [Member] VistaShares Target 15 USA Momentum Income ETF [Member] VistaShares Target 15 USA Value Income ETF [Member] VistaShares Target 15 USA Quality Income ETF [Member] VistaShares Target 15 USA Low Volatility Income ETF [Member] VistaShares Target 15 Berkshire Select Income ETF. VistaShares Target 15 Berkshire Select Income ETF. VistaShares Target 15 USA Momentum Income ETF. VistaShares Target 15 USA Momentum Income ETF. VistaShares Target 15 USA Value Income ETF. VistaShares Target 15 USA Value Income ETF. VistaShares Target 15 USA Quality Income ETF. VistaShares Target 15 USA Quality Income ETF. VistaShares Target 15 USA Low Volatility Income ETF. VistaShares Target 15 USA Low Volatility Income ETF. U.S. Government and U.S. Agency Obligations Risk. Tax Risk. Operational Risk. Newer Sub-Adviser Risk. New Fund Risk. Market Events Risk. Mid-Capitalization Investing. Large-Capitalization Investing. Market Capitalization Risk. Management Risk. Inflation Risk. High Portfolio Turnover Risk. Focused Portfolio 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. Equity Market Risk. NAV Decline Risk Due to Distributions. Distribution Risk. Counterparty Risk. Options. Derivatives Risk. Low Volatility Investing Risks. Newer Fund Risk. Quality Style Investing Risks. Value Investing Risk. Momentum Investing Risk. Index / Strategy Risks. Berkshire Hathaway Management Change.