Revenue Recognition - Deferred Revenues (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Revenue recognized during the period that was included in deferred revenues at the beginning of the period	$ 9,610	$ 7,877
Deferred revenue, current portion	15,012		$ 10,777
Deferred revenue, Long-term	21,033		20,001
Deferred revenue	36,045	$ 28,337	$ 30,778	$ 28,722
BGI Genomics
Revenue recognized	44,000
Deferred revenue, Long-term	19,300
Deferred revenue	19,300
Foundation Medicine ("FMI")
Revenue recognized	24,300
Deferred revenue, current portion	2,200
Deferred revenue, Long-term	1,700
Deferred revenue	3,900
BGI Genomics and Foundation Medicine ("FMI")
Revenue recognized during the period that was included in deferred revenues at the beginning of the period	800
Genetic testing services
Revenue recognized during the period that was included in deferred revenues at the beginning of the period	8,800
Deferred revenue, current portion	$ 12,800