Segment Reporting - Schedule of Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Segment Reporting [Line Items]
Revenue	$ 123,101	$ 116,743	$ 339,795	$ 306,550
Depreciation and amortization	3,300	2,400	9,100	6,800
Stock-based compensation	8,253	10,586	23,591	22,382
Gross profit	86,060	84,527	232,509	213,905
Impairment loss	0	0	31,287	0
(Loss) income from operations	(10,428)	(3,251)	(85,354)	1,158
Total non-operating expense, net	(1,873)	(4,137)	(7,624)	(4,065)
Loss before income taxes	(12,301)	(7,388)	(92,978)	(2,907)
Income tax expense	(26)	(247)	(405)	(448)
Net loss	(12,327)	(7,635)	(93,383)	(3,355)
GeneDx Segment
Segment Reporting [Line Items]
Revenue	123,101	116,743	339,795	306,550
Adjusted cost of services	34,965	30,623	101,034	88,227
Adjusted gross profit	$ 88,136	$ 86,120	$ 238,761	$ 218,323
Adjusted gross margin	71.60%	73.80%	70.30%	71.20%
Depreciation and amortization	$ 1,687	$ 1,374	$ 4,875	$ 3,838
Stock-based compensation	371	219	1,312	580
Restructuring charges	18	0	65	0
Gross profit	$ 86,060	$ 84,527	$ 232,509	$ 213,905
Gross margin	69.90%	72.40%	68.40%	69.80%
Operating expenses, net	$ 96,488	$ 87,778	$ 286,576	$ 212,747
Impairment loss	0	0	31,287	0
(Loss) income from operations	(10,428)	(3,251)	(85,354)	1,158
Total non-operating expense, net	(1,873)	(4,137)	(7,624)	(4,065)
Loss before income taxes	(12,301)	(7,388)	(92,978)	(2,907)
Income tax expense	(26)	(247)	(405)	(448)
Net loss	$ (12,327)	$ (7,635)	$ (93,383)	$ (3,355)