Certain Balance Sheet Components - Property and Equipment, net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 57,545		$ 57,545		$ 38,916
Accumulated depreciation and amortization	(24,534)		(24,534)		(20,152)
Operating lease right-of-use assets, net	33,011		33,011		18,764
Depreciation and amortization	3,956	$ 2,494	7,493	$ 4,474
Capitalized internal-use software costs	7,200	4,600	14,600	8,700
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	8,110		8,110		8,110
Computer equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	9,038		9,038		8,885
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,507		2,507		2,597
Internally developed and purchased software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	37,890		37,890		$ 19,324
Property, Plant and Equipment
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 2,500	$ 1,000	$ 4,600	$ 2,000