Fair Value Measurements, Reconciliation for Level 3 Assets Measured at Fair Value on a Recurring Basis (Details)	12 Months Ended
	Dec. 31, 2020 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 34,514,762
Total unrealized gain or (losses) [Abstract]
Realized gains (losses)	2,499,653
Unrealized gains (losses)	5,560,424
Purchases	3,890,274
Sales	(12,807,368)
Ending Balance	33,657,745
Beginning Balance	34,514,762
Total unrealized gain or (losses) [Abstract]
Ending Balance	33,657,745
Equity Securities Measured at Net Asset Value [Member]
Total unrealized gain or (losses) [Abstract]
Beginning Balance	24,239,952
Total unrealized gain or (losses) [Abstract]
Realized gains (losses)	0
Unrealized gains (losses)	4,506,736
Purchases	1,782,842
Sales	(32,905)
Ending Balance	30,496,625
Equity Securities [Member]
Total unrealized gain or (losses) [Abstract]
Beginning Balance	10,274,810
Total unrealized gain or (losses) [Abstract]
Realized gains (losses)	2,499,653
Unrealized gains (losses)	1,053,688
Purchases	2,107,432
Sales	(12,774,463)
Ending Balance	$ 3,161,120