Weitz Core Plus Bond ETF Active Management Risk [Member] Call Risk [Member] Credit Risks [Member] Debt Securities Liquidity Risk [Member] Derivatives Risk [Member] Early Close Trading Halt Risk [Member] Equity Securities Risk [Member] E T F Structure Risk [Member] Authorized Participant Risk [Member] Not Individually Redeemable [Member] Trading Issues [Member] Market Price Variance Risk [Member] Failure To Meet Investment Objective Risk [Member] Government Sponsored Enterprises Risk [Member] Interest Rate Risks [Member] Loan Investment Risk [Member] Market Risk [Member] Non Investment Grade Debt Junk Bond Securities Risk [Member] Non U S Securities Risk [Member] Structured Products Risk [Member] Weitz Multisector Bond ETF Foreign Currency Risk [Member] Loan Investment Risk Investments [Member] Weitz Short Duration Bond ETF Credit Risk [Member] Interest Rate Risk [Member] Nondiversified Risk [Member] Weitz Core Plus Bond ETF Weitz Multisector Bond ETF Weitz Short Duration Bond ETF Weitz Core Plus Bond ETF [Default Label] Weitz Multisector Bond ETF [Default Label] Weitz Short Duration Bond ETF [Default Label]