RELATED PARTY TRANSACTIONS - Schedule of Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Related Party Transaction [Line Items]
Total revenue	$ 40,785	$ 31,837
Operating expenses—Research and development	48,021	53,625
Screening revenue
Related Party Transaction [Line Items]
Total revenue	39,832	29,133
Cost of revenue	$ 21,244	17,123
Related Party | Illumina, Inc.
Related Party Transaction [Line Items]
Operating expenses—Research and development		1,396
Related Party | Illumina, Inc. | Screening revenue
Related Party Transaction [Line Items]
Total revenue		77
Related Party | Cost of screening revenue (exclusive of amortization of intangible assets) | Illumina, Inc.
Related Party Transaction [Line Items]
Cost of revenue		1,511
Related Party | Cost of development services revenue | Illumina, Inc.
Related Party Transaction [Line Items]
Cost of revenue		$ 163