v3.25.4
Expense Example
Jan. 28, 2026
USD ($)
Gabelli Media Mogul Fund | Gabelli Media Mogul Fund Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 685
Expense Example, with Redemption, 3 Years 1,692
Expense Example, with Redemption, 5 Years 2,695
Expense Example, with Redemption, 10 Years 5,191
Gabelli Media Mogul Fund | Gabelli Media Mogul Fund Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 92
Expense Example, with Redemption, 3 Years 1,113
Expense Example, with Redemption, 5 Years 2,136
Expense Example, with Redemption, 10 Years 4,702
Gabelli Pet Parents'(TM) Fund | Gabelli Pet Parents'(TM) Fund Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 685
Expense Example, with Redemption, 3 Years 1,760
Expense Example, with Redemption, 5 Years 2,824
Expense Example, with Redemption, 10 Years 5,436
Gabelli Pet Parents'(TM) Fund | Gabelli Pet Parents'(TM) Fund Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 92
Expense Example, with Redemption, 3 Years 1,186
Expense Example, with Redemption, 5 Years 2,274
Expense Example, with Redemption, 10 Years 4,970
Gabelli Food of All Nations Fund | Gabelli Food of All Nations Fund  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 92
Expense Example, with Redemption, 3 Years 605
Gabelli RBI Fund | Gabelli RBI Fund  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 92
Expense Example, with Redemption, 3 Years $ 605