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Revenue - Performance Obligations (Detail)
 12 Months Ended
Mar. 31, 2021
Software Licenses  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Performance obligation, expected payment terms 90 days
Appliances  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Performance obligation, expected payment terms 90 days
Other Professional Services (except for education services)  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Performance obligation, expected payment terms 90 days
Education Services  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Performance obligation, expected payment terms 90 days