Revenue Recognition - Deferred Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Revenue recognized during the period that was included in deferred revenues at the beginning of the period	$ 7,048	$ 3,988
Deferred revenue, current portion	17,705		$ 16,612
Deferred revenue, Long-term	18,828		19,128
Deferred revenue	36,533	$ 38,090	$ 35,740	$ 30,778
BGI Genomics
Revenue recognized	44,000
Deferred revenue, current portion	1,200
Deferred revenue, Long-term	17,300
Deferred revenue	18,500
Foundation Medicine ("FMI")
Revenue recognized	24,300
Deferred revenue, current portion	1,600
Deferred revenue, Long-term	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	400
Genetic testing services
Revenue recognized during the period that was included in deferred revenues at the beginning of the period	6,600
Deferred revenue, current portion	$ 14,900