Summary of Significant Accounting Policies - Summary of Revenue by Region (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Disaggregation Of Revenue [Line Items]
Revenue	$ 60,864	$ 64,513
Service
Disaggregation Of Revenue [Line Items]
Revenue	$ 60,864	$ 64,513
Geographic Concentration Risk [Member] | Revenue Benchmark [Member] | Service
Disaggregation Of Revenue [Line Items]
Percentage of Revenue	100.00%	100.00%
United States
Disaggregation Of Revenue [Line Items]
Revenue	$ 43,326	$ 48,108
United States | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Disaggregation Of Revenue [Line Items]
Percentage of Revenue	71.00%	75.00%
United Kingdom
Disaggregation Of Revenue [Line Items]
Revenue	$ 14,355	$ 11,975
United Kingdom | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Disaggregation Of Revenue [Line Items]
Percentage of Revenue	24.00%	19.00%
Canada
Disaggregation Of Revenue [Line Items]
Revenue	$ 2,170	$ 3,039
Canada | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Disaggregation Of Revenue [Line Items]
Percentage of Revenue	3.00%	4.00%
Other
Disaggregation Of Revenue [Line Items]
Revenue	$ 1,013	$ 1,391
Other | Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Disaggregation Of Revenue [Line Items]
Percentage of Revenue	2.00%	2.00%