Certain Balance Sheet Components - Property and Equipment, net (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 31,407,000		$ 31,407,000		$ 22,849,000
Accumulated depreciation and amortization	(17,077,000)		(17,077,000)		(15,409,000)
Property and equipment, net	14,330,000		14,330,000		7,440,000
Depreciation and amortization	2,494,000	$ 921,000	4,474,000	$ 1,900,000
Capitalized internal-use software costs	4,600,000	$ 0	8,700,000	$ 0
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	8,110,000		8,110,000		8,110,000
Computer equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	8,965,000		8,965,000		9,115,000
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,519,000		2,519,000		2,542,000
Internally developed and purchased software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 11,813,000		$ 11,813,000		$ 3,082,000