Revenue Recognition - Disaggregation (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]
Total revenues	$ 210,637	$ 158,116	$ 602,970	$ 452,458
United States
Disaggregation of Revenue [Line Items]
Total revenues	197,066	148,033	576,169	427,804
Americas, excluding U.S.
Disaggregation of Revenue [Line Items]
Total revenues	1,155	1,247	2,426	3,052
Europe, Middle East, India, Africa
Disaggregation of Revenue [Line Items]
Total revenues	4,956	5,598	12,383	14,322
Asia Pacific and Other
Disaggregation of Revenue [Line Items]
Total revenues	7,460	3,238	11,992	7,280
Insurance carriers
Disaggregation of Revenue [Line Items]
Total revenues	174,825	132,423	507,389	351,218
Laboratory partners
Disaggregation of Revenue [Line Items]
Total revenues	27,050	17,441	69,929	77,575
Patients
Disaggregation of Revenue [Line Items]
Total revenues	8,762	8,252	25,652	23,665
Licensing and other
Disaggregation of Revenue [Line Items]
Total revenues	$ 10,806	$ 4,176	$ 18,555	$ 38,487