Investments (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Equity Securities without Readily Determinable Fair Value
Cost of investment	$ 3,000,000		$ 3,000,000
Cumulative impairment	0		0
Cumulative upward adjustment	1,150,000		1,150,000
Carrying amount of investment	4,150,000		$ 4,150,000
Equity Securities, Gain (Loss)
Realized gain (loss)	0
Unrealized gain (loss)	$ 0	$ 1,200,000