Summary of Significant Accounting Policies - Summary of Revenue by Category (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Disaggregation Of Revenue [Line Items]
Revenue	$ 56,891	$ 55,477	$ 171,334	$ 155,338
PGS
Disaggregation Of Revenue [Line Items]
Revenue	38,367	44,094	130,705	119,381
Telehealth
Disaggregation Of Revenue [Line Items]
Revenue	7,673	0	7,673	0
Consumer services
Disaggregation Of Revenue [Line Items]
Revenue	46,040	44,094	138,378	119,381
Research Services
Disaggregation Of Revenue [Line Items]
Revenue	10,851	11,383	32,956	35,909
Therapeutics
Disaggregation Of Revenue [Line Items]
Revenue	0	0	0	48
Service
Disaggregation Of Revenue [Line Items]
Revenue	$ 56,891	$ 55,477	$ 171,334	$ 155,338
Product Concentration Risk [Member] | Revenue Benchmark [Member] | PGS
Disaggregation Of Revenue [Line Items]
Percentage of Revenue	67.00%	79.00%	76.00%	77.00%
Product Concentration Risk [Member] | Revenue Benchmark [Member] | Telehealth
Disaggregation Of Revenue [Line Items]
Percentage of Revenue	14.00%	0.00%	5.00%	0.00%
Product Concentration Risk [Member] | Revenue Benchmark [Member] | Consumer services
Disaggregation Of Revenue [Line Items]
Percentage of Revenue	81.00%	79.00%	81.00%	77.00%
Product Concentration Risk [Member] | Revenue Benchmark [Member] | Research Services
Disaggregation Of Revenue [Line Items]
Percentage of Revenue	19.00%	21.00%	19.00%	23.00%
Product Concentration Risk [Member] | Revenue Benchmark [Member] | Therapeutics
Disaggregation Of Revenue [Line Items]
Percentage of Revenue	0.00%	0.00%	0.00%	0.00%
Product Concentration Risk [Member] | Revenue Benchmark [Member] | Service
Disaggregation Of Revenue [Line Items]
Percentage of Revenue	100.00%	100.00%	100.00%	100.00%