Nicholas Fixed Income Alternative ETF Nicholas Fixed Income Alternative ETF [Member] Derivatives Risk [Member] Option Contracts [Member] Counterparty Risk [Member] Strategy Risk [Member] Equity Market Risk [Member] High Portfolio Turnover Risk [Member] U.S. Government and U.S. Agency Obligations Risk [Member] Hedging Transactions 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] General Market Risk [Member] Illiquid Investments Risk [Member] Interest Rates Risk [Member] Management Risk [Member] Market Events Risk [Member] Newer Fund Risk [Member] Operational Risk [Member] Bloomberg US Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes) Nicholas Global Equity and Income ETF Nicholas Global Equity and Income ETF [Member] Index ETF Risks [Member] Indirect Investment Risk [Member] Index Trading Risk [Member] Index Risks [Member] Options Contracts [Member] Correlation Risks [Member] Foreign Investment Risk [Member] Foreign Securities Risk [Member] Emerging Markets Risk [Member] Market Capitalization Risk [Member] Large-Capitalization Investing [Member] Mid-Capitalization Investing [Member] Small-Capitalization Investing [Member] Distribution Risk [Member] NAV Erosion Risk Due to Distributions [Member] Inflation Risk [Member] Liquidity Risk [Member] Tax Risk [Member] Nicholas Fixed Income Alternative ETF Nicholas Fixed Income Alternative ETF Bloomberg US Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes) U.S. Government and U.S. Agency Obligations Risk. ETF Risks. Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. Costs of Buying or Selling Shares. Shares May Trade at Prices Other Than NAV. Derivatives Risk. Option Contracts. Counterparty Risk. Strategy Risk. Equity Market Risk. High Portfolio Turnover Risk. Hedging Transactions Risk. Cash Redemption Risk. Trading. General Market Risk. Illiquid Investments Risk. Management Risk. Newer Fund Risk. Nicholas Global Equity and Income ETF Nicholas Global Equity and Income ETF Index ETF Risks. Large-Capitalization Investing. Mid-Capitalization Investing. Small-Capitalization Investing. NAV Erosion Risk Due to Distributions. Indirect Investment Risk. Index Trading Risk. Index Risks. Options Contracts. Correlation Risks. Foreign Investment Risk. Foreign Securities Risk. Emerging Markets Risk. Market Capitalization Risk. Distribution Risk. Inflation Risk. Liquidity Risk. Operational Risk. Tax Risk. Market Events Risk. Interest Rates Risk.