Leases, Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash paid for amounts included in the measurement of lease liabilities [Abstract]
Operating cash flows from operating leases	$ 1,148	$ 882
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 221	$ 7,827	$ 0