Revenue Recognition - Deferred Revenues (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Revenue recognized during the period that was included in deferred revenues at the beginning of the period	$ 32,864
Deferred revenue, current portion	9,667	$ 50,125
Deferred revenue, Long-term	22,706	22,805
Deferred revenue	32,373	$ 72,930
BGI Genomics
Deferred revenue, current portion	3,500
Foundation Medicine ("FMI")
Deferred revenue, current portion	3,700
Qiagen
Revenue recognized during the period that was included in deferred revenues at the beginning of the period	$ 28,600