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Investments - Equity Method Investments (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Total assets	$ 237,073,628	$ 80,845,124
Total liabilities	38,453,935	22,287,437
Net assets	198,619,693	58,557,687
DHCM's portion of net assets	61,149,774	16,339,649
Investment income	5,346,588	1,154,007	$ 2,944,836
Expenses	1,551,291	978,322	1,176,896
Net realized gains	6,390,727	1,918,661	4,432,850
Net change in unrealized appreciation (depreciation)	14,805,837	(10,229,319)	5,613,627
Net income (loss)	24,991,861	(8,134,973)	11,814,417
DHCM’s portion of net income (loss)	$ 8,301,571	$ (2,400,467)	$ 3,206,702

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The amount of expenses reported by an equity method investment of the entity.

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