Investments (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Equity securities impairment loss	$ 2,500	$ 2,500
Equity securities without readily determinable fair value	$ 1,000	$ 1,000	$ 3,500