Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Mar. 31, 2024 USD ($) Customer PerformanceObligation	Mar. 31, 2023 USD ($) Customer	Mar. 31, 2022 Customer
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Maturities of short term investment interest-bearing securities	90 days
Accounts receivable due period	30 days
Revenue recognition, number of performance obligation | PerformanceObligation	1
Unbilled account receivables	$ 42,417,000	$ 26,639,000
Capitalized software development costs	37,166,000	33,695,000
Accumulated amortization of software development costs	155,998,000	143,329,000
Impairment of goodwill, intangible assets or other long-lived assets	0	0
Goodwill	36,814,000	36,814,000
Accumulated amortization of goodwill	$ 2,069,000	$ 2,069,000
Computer Software Property and Equipment [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Amortization period of computer software	5 years
Customer Concentration Risk [Member] | Sales Revenue, Net [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of customer | Customer	0	0	0
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | No Customer [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Maximum customer risk percentage	10.00%	10.00%	10.00%
Credit Concentration Risk [Member] | Accounts Receivable [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of customer | Customer	1	1
Credit Concentration Risk [Member] | Accounts Receivable [Member] | One Customer [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Maximum customer risk percentage	10.00%	10.00%