Revenue from Contracts with Customers - Schedule of Revenues Disaggregated by Major Revenue Categories and by Occurrence (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation Of Revenue [Line Items]
Total revenues	$ 149,286	$ 140,002	$ 295,370	$ 270,881
Subscription Services
Disaggregation Of Revenue [Line Items]
Total revenues	41,139	36,867	79,423	72,227
Support And Maintenance
Disaggregation Of Revenue [Line Items]
Total revenues	39,004	38,076	77,490	76,623
Managed Services
Disaggregation Of Revenue [Line Items]
Total revenues	29,506	26,218	58,937	48,711
Electronic Data Interchange And Data Services
Disaggregation Of Revenue [Line Items]
Total revenues	25,960	24,530	52,140	47,652
Recurring Revenue
Disaggregation Of Revenue [Line Items]
Total revenues	135,609	125,691	267,990	245,213
Software License and Hardware
Disaggregation Of Revenue [Line Items]
Total revenues	8,068	8,014	15,282	12,754
Other Non-recurring Services
Disaggregation Of Revenue [Line Items]
Total revenues	5,609	6,297	12,098	12,914
Software, Hardware, and Other Non-recurring
Disaggregation Of Revenue [Line Items]
Total revenues	$ 13,677	$ 14,311	$ 27,380	$ 25,668