Revenue - Summary of Total Revenue by Type of Service (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Total revenue	$ 180,566	$ 199,299	$ 550,224	$ 596,862
Screening services
Disaggregation of Revenue [Line Items]
Total revenue	178,809	197,870	544,330	591,900
Other services
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,757	$ 1,429	$ 5,894	$ 4,962