Revenue Recognition - Disaggregation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Total revenues	$ 261,404	$ 198,200	$ 503,160	$ 392,333
United States
Disaggregation of Revenue [Line Items]
Total revenues	253,296	191,886	486,550	379,103
Americas, excluding U.S.
Disaggregation of Revenue [Line Items]
Total revenues	1,206	530	2,364	1,271
Europe, Middle East, India, Africa
Disaggregation of Revenue [Line Items]
Total revenues	5,620	3,736	10,816	7,427
Asia Pacific and Other
Disaggregation of Revenue [Line Items]
Total revenues	1,282	2,048	3,430	4,532
Insurance carriers
Disaggregation of Revenue [Line Items]
Total revenues	226,521	167,822	436,899	332,564
Laboratory partners
Disaggregation of Revenue [Line Items]
Total revenues	27,449	22,142	50,254	42,879
Patients
Disaggregation of Revenue [Line Items]
Total revenues	7,434	8,236	16,007	16,890
Licensing and other
Disaggregation of Revenue [Line Items]
Total revenues	$ 3,148	$ 3,618	$ 7,107	$ 7,749