Property and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Property Plant And Equipment [Line Items]
Total property and equipment–at cost	$ 7,318	$ 7,269
Less: Accumulated depreciation	(5,176)	(5,026)
Property and equipment, net	2,142	2,243
Equipment
Property Plant And Equipment [Line Items]
Total property and equipment–at cost	5,345	5,351
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Total property and equipment–at cost	365	365
Leasehold Improvements
Property Plant And Equipment [Line Items]
Total property and equipment–at cost	1,586	1,531
Software
Property Plant And Equipment [Line Items]
Total property and equipment–at cost	$ 22	$ 22