Summary of Significant Accounting Policies - Narrative (Details) $ in Thousands		3 Months Ended						9 Months Ended
	Aug. 11, 2025 USD ($) shares	Sep. 30, 2025 USD ($)	Jun. 30, 2025 USD ($)	Mar. 31, 2025 USD ($)	Sep. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Sep. 30, 2025 USD ($) segment	Sep. 30, 2024 USD ($)	Jan. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Capitalized Contract Cost [Line Items]
Number of reportable segments | segment								1
Number of operating segments | segment								1
Deferred offering costs		$ 0						$ 0			$ 413
Leases, initial term (in months)		12 months						12 months
Derivative liability	$ 24,600			$ 20,800						$ 11,100
Revenue, customer contract period (in days)								30 days
Foreign exchange transaction (losses)		$ (342)			$ (587)			$ (95)	$ (782)
Foreign currency translation gain (loss)		$ 205	$ 291	(236)	$ (405)	$ (100)	$ 1	$ 260	$ (504)
Redeemable convertible preferred stock
Capitalized Contract Cost [Line Items]
Conversion of convertible notes to common stock (in shares) | shares	51,226,348
2025 Convertible Promissory Notes | Convertible Debt
Capitalized Contract Cost [Line Items]
Debt instrument, aggregate amount				98,300
Conversion of convertible notes to common stock (in shares) | shares	6,470,743
Derivative liability				$ 20,800						$ 11,100
Debt discount and debt issuances costs reclassified to additional paid-in-capital	$ 28,800
Options
Capitalized Contract Cost [Line Items]
Applicable service period (in years)								4 years
Implementation and Onboarding Costs
Capitalized Contract Cost [Line Items]
Capitalized contract cost, amortization period (in years)		2 years						2 years
New Site Commission Costs
Capitalized Contract Cost [Line Items]
Capitalized contract cost, amortization period (in years)		3 years						3 years