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Supplementary Financial Information - Warranty Reserve Activity (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Activity related to warranty reserve    
Balance at beginning of fiscal year $ 758 $ 616
Additions charged to cost of revenues 498 343
Warranty claims (442) (201)
Balance at end of fiscal year $ 814 $ 758