Consolidated balance sheet components - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 31,101	$ 30,832
Less accumulated depreciation and amortization	(22,164)	(20,945)
Property and equipment, net	8,937	9,887
Computers and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	7,001	6,798
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment	4,702	4,701
Purchased software
Property, Plant and Equipment [Line Items]
Total property and equipment	383	383
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	19,002	18,932
Construction in progress
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 13	$ 18