Leases - Components of Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Sub-lease income	$ (26)	$ (25)	$ (80)	$ (75)
Lease cost	148	156	451	474
Operating lease cost, net	122	131	371	399
Sub-lease income	(68)	(111)	(204)	(334)
Lease cost	59	105	180	321
Restructured lease income, net	(9)	(6)	(24)	(13)
Interest of lease liabilities	0	1	0	2
Total lease cost, net	$ 113	$ 126	$ 347	$ 388