Revenue - Summary of Total Revenue by Type of Service (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Revenues	$ 199,299	$ 169,557	$ 596,862	$ 468,255
Screening services
Disaggregation of Revenue [Line Items]
Revenues	197,870	168,372	591,900	463,763
Other services
Disaggregation of Revenue [Line Items]
Revenues	$ 1,429	$ 1,185	$ 4,962	$ 4,492