Fair Value Measurements - Schedule of Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Equity Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 10,581,334	$ 4,995,000	$ 9,080,000	$ 0
Total gains or losses recognized in earnings	(2,890,502)	(332,263)	(1,522,120)	(332,263)
Additions	0	987,263	0	5,982,263
Transfers	(2,820,000)	0	(3,920,000)	0
Ending balance	9,013,497	5,650,000	9,013,497	5,650,000
Contingent forward asset
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Additions	0	0	1,232,952
Transfers	(1,998,832)	0	(1,998,832)	0
Tonogold note receivable
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Additions	$ 6,141,497	$ 0	$ 6,141,497	$ 0