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Goodwill and Purchased Intangibles Assets - Narrative (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Sep. 14, 2022
Acquired Finite-Lived Intangible Assets [Line Items]          
Amortization expense $ 2,300 $ 1,700 $ 4,600 $ 3,400  
K2 Cyber Security Inc.          
Acquired Finite-Lived Intangible Assets [Line Items]          
Developed technology acquired         $ 7,400
Goodwill acquired         $ 8,600