Revenue - Additional Information (Details) - USD ($)	3 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Mar. 31, 2024
Disaggregation of Revenue [Line Items]
Revenue recognized from unreturned kits	$ 4,000,000.0	$ 4,600,000
Contract assets	$ 0		$ 0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01
Disaggregation of Revenue [Line Items]
Revenue to be recognized, percentage	69.00%
Remaining performance obligation, expected timing of satisfaction, period	12 months
Consumer services
Disaggregation of Revenue [Line Items]
Deferred revenue for customer services	$ 51,300,000		52,300,000
Revenue recognized	21,600,000
Research services
Disaggregation of Revenue [Line Items]
Deferred revenue for customer services	21,700,000		22,500,000
Revenue recognized	1,000,000.0
Remaining performance obligations	26,400,000
Research services | Related Party
Disaggregation of Revenue [Line Items]
Deferred revenue for customer services	20,800,000		$ 21,000,000.0
Revenue recognized	$ 200,000