Consolidated balance sheet components - Narrative (Details) $ in Thousands		12 Months Ended
	Apr. 08, 2025 USD ($)	Dec. 31, 2025 USD ($) security	Dec. 31, 2024 USD ($) security	Dec. 31, 2023 USD ($)	Aug. 24, 2021 USD ($)
Intangible Asset, Acquired, Finite-Lived [Line Items]
Realized gains and losses reclassified from accumulated other comprehensive loss to other income (expense), net		$ 0	$ 0
Number of continuous unrealized loss position for twelve months or longer | security		0	0
Depreciation		$ 3,100	$ 2,700	$ 3,000
Amortization expense of capitalized software		20,800	19,900	17,500
Amortization expense of intangible assets		1,500	2,800	$ 4,100
Goodwill		$ 12,646	$ 12,646
CorpU
Intangible Asset, Acquired, Finite-Lived [Line Items]
Goodwill					$ 12,600
Assembled workforce
Intangible Asset, Acquired, Finite-Lived [Line Items]
Intangible assets, net and goodwill	$ 1,500