Shareholder Fees	Apr. 30, 2025 USD ($)
Gabelli Growth Innovators ETF \| Gabelli Growth Innovators ETF [Default Label]
Prospectus [Line Items]
Shareholder Fee, Other	$ 0
Gabelli Equity Income ETF \| Gabelli Equity Income ETF [Default Label]
Prospectus [Line Items]
Shareholder Fee, Other	0
Gabelli Small & Mid Cap ETF \| Gabelli Small & Mid Cap ETF [Default Label]
Prospectus [Line Items]
Shareholder Fee, Other	0
Gabelli Micro Cap ETF \| Gabelli Micro Cap ETF [Default Label]
Prospectus [Line Items]
Shareholder Fee, Other	0
Gabelli Love Our Planet & People ETF \| Gabelli Love Our Planet & People ETF [Default Label]
Prospectus [Line Items]
Shareholder Fee, Other	0
Gabelli Automation ETF \| Gabelli Automation ETF [Default Label]
Prospectus [Line Items]
Shareholder Fee, Other	0
Gabelli Commercial Aerospace and Defense ETF \| Gabelli Commercial Aerospace and Defense ETF [Default Label]
Prospectus [Line Items]
Shareholder Fee, Other	0
Gabelli Green Energy ETF \| Gabelli Green Energy ETF [Default Label]
Prospectus [Line Items]
Shareholder Fee, Other	0
Gabelli Financial Services Opportunities ETF \| Gabelli Financial Services Opportunities ETF [Default Label]
Prospectus [Line Items]
Shareholder Fee, Other	$ 0