Summary of Significant Accounting Policies - Schedule of Customer Accounting of Segment Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Total Revenue	$ 55,204	$ 51,804	$ 114,443	$ 99,861
Customer C | Consumer And Research Services
Segment Reporting Information [Line Items]
Total Revenue	$ 14,935	$ 6,840	$ 23,447	$ 13,064
Customer C | Consumer And Research Services | Revenue Benchmark [Member] | Customer Concentration Risk [Member]
Segment Reporting Information [Line Items]
Percentage of Revenue	27.00%	13.00%	20.00%	13.00%
Customer B | Consumer And Research Services
Segment Reporting Information [Line Items]
Total Revenue	$ 10,002	$ 9,840	$ 21,212	$ 21,667
Customer B | Consumer And Research Services | Revenue Benchmark [Member] | Customer Concentration Risk [Member]
Segment Reporting Information [Line Items]
Percentage of Revenue	18.00%	19.00%	19.00%	22.00%
Customer E | Therapeutics
Segment Reporting Information [Line Items]
Total Revenue	$ 0	$ 0	$ 0	$ 48
Customer E | Therapeutics | Revenue Benchmark [Member] | Customer Concentration Risk [Member]
Segment Reporting Information [Line Items]
Percentage of Revenue	0.00%	0.00%	0.00%	100.00%