Consolidated balance sheet components - Summary of Intangible Assets Acquired through Business Combination (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Intangible Asset, Acquired, Finite-Lived [Line Items]
Intangible Assets, Gross	$ 16,600	$ 15,100
Accumulated Amortization	(13,735)	(12,672)
Intangible Assets, Net	$ 2,865	$ 2,428
Customer relationships
Intangible Asset, Acquired, Finite-Lived [Line Items]
Estimated Useful Lives	6 years	6 years
Intangible Assets, Gross	$ 5,500	$ 5,500
Accumulated Amortization	(3,760)	(3,072)
Intangible Assets, Net	$ 1,740	$ 2,428
Assembled workforce
Intangible Asset, Acquired, Finite-Lived [Line Items]
Estimated Useful Lives	2 years
Intangible Assets, Gross	$ 1,500
Accumulated Amortization	(375)
Intangible Assets, Net	$ 1,125
Vendor relationships
Intangible Asset, Acquired, Finite-Lived [Line Items]
Estimated Useful Lives	3 years	3 years
Intangible Assets, Gross	$ 4,500	$ 4,500
Accumulated Amortization	(4,500)	(4,500)
Intangible Assets, Net	$ 0	$ 0
Developed technology
Intangible Asset, Acquired, Finite-Lived [Line Items]
Estimated Useful Lives	3 years	3 years
Intangible Assets, Gross	$ 4,200	$ 4,200
Accumulated Amortization	(4,200)	(4,200)
Intangible Assets, Net	$ 0	$ 0
Tradename
Intangible Asset, Acquired, Finite-Lived [Line Items]
Estimated Useful Lives	2 years	2 years
Intangible Assets, Gross	$ 900	$ 900
Accumulated Amortization	(900)	(900)
Intangible Assets, Net	$ 0	$ 0