Property and Equipment, net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property and equipment	$ 7,591	$ 7,268
Less accumulated depreciation	(5,955)	(5,191)
Property and equipment, net	1,636	2,077
Depreciation expense	764	872
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment	$ 1,525	1,476
Estimated Useful Life (years)	7 years
Office equipment
Property, Plant and Equipment [Line Items]
Property and equipment	$ 1,077	1,152
Estimated Useful Life (years)	3 years
Equipment
Property, Plant and Equipment [Line Items]
Property and equipment	$ 3,834	3,485
Estimated Useful Life (years)	7 years
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment	$ 1,155	$ 1,155
Estimated Useful Life (years)	2 years