Zacks Income ETF Concentration Risk [Member] Financial Services Risk [Member] Equity Securities Risk [Member] Management Risk [Member] Dividend Paying Securities Risk [Member] Quantitative Model Risk [Member] Large Cap Securities Risk [Member] Small And Medium Cap Securities Risk [Member] Common Stock Risk [Member] Market Risk [Member] New Fund Risk [Member] Authorized Participant Risk [Member] Early Close Trading Halt Risk [Member] Etf Structure Risks [Member] Not Individually Redeemable [Member] Trading Issues [Member] Cash Purchases [Member] Market Price Variance Risk [Member] Investment Risk [Member] Cybersecurity Risk [Member] Market Disruption And Geopolitical Risk [Member] Reit Risk [Member] Master Limited Partnerships Risk [Member] Canadian Royalty Trust Risk [Member] Character Of Distributions Risk [Member] Distribution Policy Risk [Member] Zacks Preferred Income ETF Preferred Stock Risk [Member] Changes In Issuers Creditworthiness [Member] Ability To Make Payments [Member] Subordinated Position [Member] Interest Rate Changes [Member] Lack Of Voting Rights [Member] Lower Rated Securities Risk [Member] Zacks Income ETF Zacks Preferred Income ETF Zacks Income ETF [Default Label] Zacks Preferred Income ETF [Default Label]