Property and Equipment, net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Property and Equipment
Property and equipment, gross	$ 2,012	$ 2,715
Less accumulated depreciation and amortization	2,012	2,551
Property and equipment, net	0	164
Depreciation expense	164	500
Computer equipment
Property and Equipment
Property and equipment, gross	249	278
Software
Property and Equipment
Property and equipment, gross	968	968
Furniture, fixtures and other
Property and Equipment
Property and equipment, gross	606	1,170
Leasehold improvements
Property and Equipment
Property and equipment, gross	$ 189	$ 299