Leases - Schedule of Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Operating Leases
Operating lease, right-of-use asset	$ 292	$ 794
Restructured lease, right-of-use asset	0	107
Operating lease right-of-use assets, total	292	901
Operating lease liabilities	351	916
Restructured lease liabilities	0	168
Operating lease liabilities, total	351	1,084
Finance Leases
Property and equipment	13	13
Allowances for depreciation	(12)	(9)
Finance lease assets, net	1	4
Finance lease liabilities	$ 1	$ 4