Revenue Recognition - Deferred Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Revenue recognized during the period that was included in deferred revenues at the beginning of the period	$ 3,889	$ 30,292
Deferred revenue, current portion	13,914		$ 7,404
Deferred revenue, Long-term	20,543		21,318
Deferred revenue	34,457	$ 32,885	$ 28,722	$ 72,930
BGI Genomics
Deferred revenue, current portion	7,500
Foundation Medicine ("FMI")
Deferred revenue, current portion	1,600
BGI Genomics and Foundation Medicine ("FMI")
Revenue recognized during the period that was included in deferred revenues at the beginning of the period	$ 2,300