Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue [Line Items]
Revenue	$ 83,523	$ 38,419	$ 209,059	$ 107,505
Prenatal
Disaggregation of Revenue [Line Items]
Revenue	74,071	36,601	191,001	102,680
Oncology
Disaggregation of Revenue [Line Items]
Revenue	8,691	1,138	15,814	1,851
Clinical trial support and other services
Disaggregation of Revenue [Line Items]
Revenue	$ 761	$ 680	$ 2,244	$ 2,974