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Investments - Equity Method Investments (Details) - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]      
Assets $ 263,097,341 $ 272,663,950  
Liabilities 69,644,255 65,629,445  
Company sponsored equity method investments 0 61,149,774  
Investment income (loss), net 6,584,849 30,507,375 $ (6,272,678)
Realized gains (1,488,059) 9,056,152 2,143,695
Unrealized gains (losses) 5,348,243 15,086,747 (16,067,048)
DHCM’s portion of net income (loss) 1,807,279 8,301,571 (2,400,467)
Equity Method Investment, Nonconsolidated Investee or Group of Investees      
Schedule of Equity Method Investments [Line Items]      
Assets 0 237,073,628  
Liabilities 0 38,453,935  
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 0 198,619,693  
Investment income (loss), net 4,246,021 5,346,588 1,154,007
Other Cost and Expense, Operating 1,114,278 1,551,291 978,322
Realized gains (1,577,639) 6,390,727 1,918,661
Unrealized gains (losses) 2,289,667 14,805,837 (10,229,319)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest $ 3,843,771 $ 24,991,861 $ (8,134,973)