Nature of the Business - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
PCR testing, amount recorded, COVID-19	$ 0	$ 6,061
PCR testing, write-offs, COVID-19		5,300
PCR testing, general and administrative expenses, COVID-19	0	$ 800
COVID-19, deferred social security payroll tax	$ 3,000		$ 3,000