Property and Equipment, net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 7,760		$ 7,760		$ 7,591
Less accumulated depreciation	(6,301)		(6,301)		(5,955)
Property and equipment, net	1,459		1,459		1,636
Depreciation expense	200	$ 200	400	$ 400
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,525		$ 1,525		1,525
Estimated Useful Life (years)			7 years
Office equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,077		$ 1,077		1,077
Estimated Useful Life (years)			3 years
Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	4,003		$ 4,003		3,834
Estimated Useful Life (years)			7 years
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,155		$ 1,155		$ 1,155
Estimated Useful Life (years)			2 years