Revenue Recognition - Deferred Revenues (Details) - USD ($) $ in Thousands	1 Months Ended	9 Months Ended
	Feb. 28, 2019	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024	Dec. 31, 2023
Deferred Revenue Arrangement [Line Items]
Revenue recognized during the period included in deferred revenues at the beginning of the period		$ 16,417	$ 12,102
Deferred revenue, current portion		21,786		$ 19,754
Deferred revenue, Long-term		16,444		16,838
Deferred revenue		38,230	$ 34,802	36,592	$ 35,740
BGI Genomics
Deferred Revenue Arrangement [Line Items]
Revenue recognized	$ 44,000
Deferred revenue, current portion		500
Deferred revenue, Long-term		16,400
Deferred revenue		16,900		$ 17,300
Foundation Medicine ("FMI")
Deferred Revenue Arrangement [Line Items]
Deferred revenue, current portion		1,700
BGI Genomics and Foundation Medicine
Deferred Revenue Arrangement [Line Items]
Revenue recognized during the period included in deferred revenues at the beginning of the period		400
Genetic testing services
Deferred Revenue Arrangement [Line Items]
Revenue recognized during the period included in deferred revenues at the beginning of the period		16,000
Deferred revenue, current portion		$ 19,600