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ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Revenue by Geographical Region (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue	$ 837.6	$ 753.2	$ 678.4
Hereditary Cancer
Disaggregation of Revenue [Line Items]
Revenue	364.5	327.8	305.5
Tumor Profiling
Disaggregation of Revenue [Line Items]
Revenue	125.8	135.6	128.6
Prenatal
Disaggregation of Revenue [Line Items]
Revenue	177.1	151.3	116.4
Pharmacogenomics
Disaggregation of Revenue [Line Items]
Revenue	170.2	138.5	127.6
Autoimmune
Disaggregation of Revenue [Line Items]
Revenue	0.0	0.0	0.3
United States
Disaggregation of Revenue [Line Items]
Revenue	769.5	671.7	591.5
United States | Hereditary Cancer
Disaggregation of Revenue [Line Items]
Revenue	318.6	280.5	263.5
United States | Tumor Profiling
Disaggregation of Revenue [Line Items]
Revenue	104.2	102.1	84.5
United States | Prenatal
Disaggregation of Revenue [Line Items]
Revenue	176.5	150.6	115.6
United States | Pharmacogenomics
Disaggregation of Revenue [Line Items]
Revenue	170.2	138.5	127.6
United States | Autoimmune
Disaggregation of Revenue [Line Items]
Revenue	0.0	0.0	0.3
Rest of world
Disaggregation of Revenue [Line Items]
Revenue	68.1	81.5	86.9
Rest of world | Hereditary Cancer
Disaggregation of Revenue [Line Items]
Revenue	45.9	47.3	42.0
Rest of world | Tumor Profiling
Disaggregation of Revenue [Line Items]
Revenue	21.6	33.5	44.1
Rest of world | Prenatal
Disaggregation of Revenue [Line Items]
Revenue	0.6	0.7	0.8
Rest of world | Pharmacogenomics
Disaggregation of Revenue [Line Items]
Revenue	0.0	0.0	0.0
Rest of world | Autoimmune
Disaggregation of Revenue [Line Items]
Revenue	$ 0.0	$ 0.0	$ 0.0

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