Consolidated Balance Sheet Components - Property, Equipment and Software, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property, equipment and software, gross	$ 800	$ 21,619
Less: accumulated amortization and depreciation	(740)	(1,875)
Total	60	19,744
Internal use software
Property, Plant and Equipment [Line Items]
Property, equipment and software, gross	0	4,383
Purchased software
Property, Plant and Equipment [Line Items]
Property, equipment and software, gross	0	99
Office, furniture and equipment
Property, Plant and Equipment [Line Items]
Property, equipment and software, gross	0	2,303
Other computer and network equipment
Property, Plant and Equipment [Line Items]
Property, equipment and software, gross	800	4,732
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, equipment and software, gross	$ 0	$ 10,102