Condensed Consolidated Balance Sheet Components - Property and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Public Utility, Property, Plant and Equipment [Line Items]
Total property and equipment	$ 879	$ 1,277
Less: accumulated depreciation	(520)	(780)
Property and equipment, net	359	497
Depreciation expense	200	400	$ 200
Loss on impairment of long lived assets	446	0	$ 0
Computer equipment
Public Utility, Property, Plant and Equipment [Line Items]
Total property and equipment	66	336
Furniture and fixtures
Public Utility, Property, Plant and Equipment [Line Items]
Total property and equipment	426	621
Leasehold improvements
Public Utility, Property, Plant and Equipment [Line Items]
Total property and equipment	387	$ 320
Leasehold Improvements and Furniture and Fixtures
Public Utility, Property, Plant and Equipment [Line Items]
Loss on impairment of long lived assets	$ 200