Consolidated balance sheet components - Narrative (Details) $ in Thousands		3 Months Ended		6 Months Ended
	Apr. 08, 2025 USD ($)	Jun. 30, 2025 USD ($) security	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($) security	Jun. 30, 2024 USD ($)	Dec. 31, 2024 USD ($) security	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	$ 0	$ 0
Number of continuous unrealized loss position for twelve months or longer | security		0		0		0
Depreciation		$ 900	800	$ 1,600	1,500
Amortization expense of capitalized software		5,600	5,000	10,900	9,800
Amortization expense of intangible assets		400	$ 1,000	600	$ 1,900
Goodwill		$ 12,646		$ 12,646		$ 12,646
CorpU
Intangible Asset, Acquired, Finite-Lived [Line Items]
Goodwill							$ 12,600
Assembled workforce
Intangible Asset, Acquired, Finite-Lived [Line Items]
Asset purchase agreement	$ 1,500