Related Party Transactions - Amended Reseller Agreement (Details) - Reseller agreement $ in Thousands		12 Months Ended
	Jun. 19, 2015 USD ($) test term	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Related Party Transaction [Line Items]
Term of agreement with related party	5 years 6 months
Equity Method Investee
Related Party Transaction [Line Items]
Number of renewals | term	3
Renewal term	3 years
Number of tests to qualify for first renewal option | test	300,000
Number of tests to qualify for second renewal option | test	570,000
Number of tests to qualify for third renewal option | test	760,000
Renewal option if threshold unmet, nonexclusive, number of years	3 years
Annual minimum fees, tier one | $	$ 2,000
Due to Related Parties | $		$ 0	$ 3
Cost of revenue | $		$ 0	$ 51