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Revenue Recognition - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended
	Nov. 30, 2023	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	Aug. 30, 2024
Disaggregation of Revenue [Line Items]
Revenue from contract with customers excluding assessed tax		$ 348,116	$ 255,737
Contract with customer liability amount of revenue recognized that was included in the opening balance		35,100	26,900
Accounts Receivable [Member]
Disaggregation of Revenue [Line Items]
Contract with customer receivable after allowance for credit loss current		24,500		$ 8,100
Long-Term Contract with Customer [Member]
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation		378,400
Commercialization and Reference Laboratory Agreement Member With Personalis Inc [Member]
Disaggregation of Revenue [Line Items]
Term of agreement	3 years
Personalis Inc [Member] \| Commercialization and Reference Laboratory Agreement Member With Personalis Inc [Member]
Disaggregation of Revenue [Line Items]
Aggregate milestone amount payable	$ 12,000
Contract with customer assets net current		$ 3,900		$ 4,700
Personalis Inc [Member] \| Commercialization and Reference Laboratory Agreement [Member]
Disaggregation of Revenue [Line Items]
Class Of Warrant Share Issued		9,218,800			9,218,800
One Year [Member] \| Long-Term Contract with Customer [Member]
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation, percentage		50.00%
Two Year [Member] \| Long-Term Contract with Customer [Member]
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation, percentage		38.00%
Three Year [Member] \| Long-Term Contract with Customer [Member]
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation, percentage		7.00%
Four and Thereafter [Member] \| Long-Term Contract with Customer [Member]
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation, percentage		5.00%
Genomics Product [Member] \| Self-Pay [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers excluding assessed tax		$ 21,800	12,300
Clinical Order [Member] \| Third-Party Payor [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers excluding assessed tax		239,300	181,500
Insights Product [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers excluding assessed tax		71,300	49,500
Trials Product [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers excluding assessed tax		9,900	9,700
Next Product [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customers excluding assessed tax		$ 5,700	$ 2,700