Stock-based compensation - Schedule of Stock-based Compensation Expense Recorded in Consolidated Statements of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation, expense	$ 52,706	$ 22,974
Cost of Revenues, Diagnostics [Member]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation, expense	2,122	1,035
Cost Of Revenues, Data And Applications [Member]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation, expense	1,553	611
Technology Research and Development [Member]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation, expense	9,506	3,319
Research and Development [Member]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation, expense	4,565	1,982
Selling, General and Administrative [Member]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation, expense	$ 34,960	$ 16,027