Revenue and Accounts Receivable Credit Concentration - Summary of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation Of Revenue [Line Items]
Revenues	$ 10,950	$ 11,885	$ 17,498	$ 40,751
Diagnostic Tests
Disaggregation Of Revenue [Line Items]
Revenues	10,206	10,838	15,839	38,033
Services
Disaggregation Of Revenue [Line Items]
Revenues	$ 744	$ 1,047	$ 1,659	$ 2,718