Segment Information - Schedule of Company Revenue and Adjusted EBITDA by Segment (Details) - USD ($)	3 Months Ended						9 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2023	Dec. 31, 2022
Segment Revenue
Revenues	$ 44,747,000			$ 66,940,000			$ 155,610,000	$ 207,112,000
Segment Adjusted EBITDA
Total Adjusted EBITDA	(47,735,000)			(43,272,000)			(142,588,000)	(122,642,000)
Net loss	(277,976,000)	$ (75,270,000)	$ (104,624,000)	(91,961,000)	$ (66,065,000)	$ (89,532,000)	(457,870,000)	(247,558,000)
Adjustments
Interest income, net	(3,230,000)			(3,671,000)			(11,289,000)	(5,307,000)
Other (income) expense, net	(23,000)			(855,000)			(501,000)	267,000
Provision for (benefit from) income taxes	19,000			(613,000)			55,000	(2,139,000)
Depreciation and amortization	4,921,000			5,257,000			13,873,000	15,512,000
Amortization of acquired intangible assets	2,397,000			4,265,000			9,673,000	12,847,000
Impairment of acquired intangible assets	0			9,968,000			0	9,968,000
Stock-based compensation expense	26,357,000			34,338,000			101,198,000	93,768,000
Loss on disposition of Lemonaid Health Limited and transaction-related costs	0			0			2,375,000	0
Litigation settlement cost	0			0			98,000	0
Goodwill impairment	198,800,000			0			198,800,000	0
Cyber security incident expenses, net of probable insurance recoveries	1,000,000			0			1,000,000	0
Total Adjusted EBITDA	(47,735,000)			(43,272,000)			(142,588,000)	(122,642,000)
Corporate, Non-Segment
Segment Adjusted EBITDA
Total Adjusted EBITDA	(10,587,000)			(13,488,000)			(35,803,000)	(41,057,000)
Consumer and Research Services
Segment Revenue
Revenues	44,747,000			66,940,000			155,610,000	207,112,000
Consumer and Research Services | Operating Segments
Segment Adjusted EBITDA
Total Adjusted EBITDA	(20,620,000)			(8,313,000)			(32,895,000)	(22,986,000)
Therapeutics
Segment Revenue
Revenues	0			0			0	0
Therapeutics | Operating Segments
Segment Adjusted EBITDA
Total Adjusted EBITDA	$ (16,528,000)			$ (21,471,000)			$ (73,890,000)	$ (58,599,000)