Summary of Significant Accounting Policies - Schedule of Customer Accounting of Segment Revenue (Details) - USD ($) $ in Thousands		12 Months Ended
		Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Total Revenue		$ 271,893	$ 243,920	$ 305,463
Customer C | Consumer And Research Services
Segment Reporting Information [Line Items]
Total Revenue	[1]	$ 53,875	$ 51,786	$ 76,087
Customer C | Consumer And Research Services | Revenue Benchmark [Member] | Customer Concentration Risk [Member]
Segment Reporting Information [Line Items]
Percentage of Revenue	[1]	20.00%	21.00%	25.00%
Customer B | Consumer And Research Services
Segment Reporting Information [Line Items]
Total Revenue	[2]	$ 46,064	$ 39,917	$ 23,768
Customer B | Consumer And Research Services | Revenue Benchmark [Member] | Customer Concentration Risk [Member]
Segment Reporting Information [Line Items]
Percentage of Revenue	[2]	17.00%	16.00%	8.00%
Customer B | Therapeutics
Segment Reporting Information [Line Items]
Total Revenue	[2]			$ 2,981
Customer B | Therapeutics | Revenue Benchmark [Member] | Customer Concentration Risk [Member]
Segment Reporting Information [Line Items]
Percentage of Revenue	[2]	0.00%	0.00%	54.00%
Customer E | Therapeutics
Segment Reporting Information [Line Items]
Total Revenue	[2]		$ 54	$ 2,575
Customer E | Therapeutics | Revenue Benchmark [Member] | Customer Concentration Risk [Member]
Segment Reporting Information [Line Items]
Percentage of Revenue	[2]	0.00%	100.00%	46.00%

[1] Customer C revenues are primarily in the United States.

[2] Customer B revenues are in the U.K. and Customer E is in a region other than the United States, U.K., or Canada.