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Related Party Transactions (Details) - USD ($)
11 Months Ended 12 Months Ended
Dec. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Related Party Transactions [Abstract]      
Investment income   $ 64,504 $ 194,955
Payable to affiliates $ 985,632 29,376 985,632
Underwriting and Sales Manager Fees [Member]      
Related Party Transactions [Abstract]      
Revenue from related party transactions   16,000 431,114
Gabelli Funds, LLC [Member] | Gabelli U.S. Treasury Money Market Fund [Member]      
Related Party Transactions [Abstract]      
Affiliated investments 6,579,577 4,724,290 6,579,577
Investment income   64,504 175,846
Gabelli Funds, LLC [Member] | Research Services [Member]      
Related Party Transactions [Abstract]      
Revenue from related party transactions     750,000
Revenue to be received from each entity per month 62,500    
Affiliated Entities [Member] | Commissions [Member]      
Related Party Transactions [Abstract]      
Revenue from related party transactions   $ 2,582,914 $ 4,875,768
Revenue percentage   64.00% 76.00%
GAMCO Asset Management Inc. [Member] | Research Services [Member]      
Related Party Transactions [Abstract]      
Revenue from related party transactions     $ 752,550
Revenue to be received from each entity per month $ 62,500    
GAMCO Global Gold, Natural Resources & Income Trust ("GGN") [Member]      
Related Party Transactions [Abstract]      
Payable to affiliates   $ 511,108  
GAMCO Global Gold, Natural Resources & Income Trust ("GGN") [Member] | Sales Manager Fees [Member]      
Related Party Transactions [Abstract]      
Revenue from related party transactions   $ 334,825 $ 729,893