Zacks All-Cap Core ETF Market Risk [Member] Equity Risk [Member] Quantitative Model Risk [Member] Foreign Investment Risk [Member] Smallcap Companies Risk [Member] Growthoriented Investment Strategies Risk [Member] Valueoriented Investment Strategies Risk [Member] Lending Portfolio Securities Risk [Member] Management And Strategy Risk [Member] Income And Distribution Risk [Member] Market Capitalization Risk [Member] Investment Risk [Member] Sector Focus Risk [Member] Cybersecurity Risk [Member] Market Disruption And Geopolitical Risk [Member] New Fund Risk [Member] Authorized Participant Risk [Member] Early Closetrading Halt Risk [Member] Etf Structure Risks [Member] Zacks Small-Cap Core ETF Portfolio Turnover Risk [Member] Short Sales Risk [Member] Zacks All-Cap Core ETF Zacks Small-Cap Core ETF Russell 3000® Index (Reflects no deductions for fees, expenses or taxes) Russell 2000® Index (Reflects no deductions for fees, expenses or taxes) Zacks All-Cap Core ETF [Default Label] Zacks Small-Cap Core ETF [Default Label]