Certain Balance Sheet Components - Property and Equipment, net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 38,916	$ 22,849
Accumulated depreciation and amortization	(20,152)	(15,409)
Property and equipment, net	18,764	7,440
Depreciation and amortization	10,741	3,853	$ 3,534
Capitalized internal-use software costs	16,400	0
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	8,110	8,110
Computer equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	8,885	9,115
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,597	2,542
Internally developed and purchased software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	19,324	3,082
Property, Plant and Equipment
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 10,700	$ 3,900	$ 3,500