Leases - Summary Of Lease Costs Are Reflected In The Statements Of Operations And Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disclosure Of Lease Costs Are Reflected In The Statements Of Operations And Comprehensive Loss [Line Items]
Total operating lease cost	$ 4,578	$ 1,136	$ 8,088	$ 1,890
Location, Statement of Income, Balance [Axis]: us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization
Disclosure Of Lease Costs Are Reflected In The Statements Of Operations And Comprehensive Loss [Line Items]
Total operating lease cost	1,082	176	1,890	265
Location, Statement of Income, Balance [Axis]: us-gaap:GeneralAndAdministrativeExpense
Disclosure Of Lease Costs Are Reflected In The Statements Of Operations And Comprehensive Loss [Line Items]
Total operating lease cost	675	127	780	211
Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpense
Disclosure Of Lease Costs Are Reflected In The Statements Of Operations And Comprehensive Loss [Line Items]
Total operating lease cost	2,550	686	4,953	1,179
Location, Statement of Income, Balance [Axis]: us-gaap:SellingAndMarketingExpense
Disclosure Of Lease Costs Are Reflected In The Statements Of Operations And Comprehensive Loss [Line Items]
Total operating lease cost	$ 271	$ 147	$ 465	$ 235