Leases - Components of Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Sublease income	$ (105)	$ (100)
Operating lease cost	597	628
Operating lease cost, net	492	528
Sublease income	(272)	(403)
Lease cost	237	385
Restructured lease cost, net	(35)	(18)
Interest on lease liabilities	0	1
Total lease cost, net	$ 457	$ 511