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Schedule II - Valuation and Qualifying Accounts - Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) | 12 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2023
Accounts Receivable - Allowance for Credit Losses [Member] |  |  |
Valuation and Qualifying Accounts Disclosure [Abstract] |  |  |
Balance at beginning of year | $ 189,000 | $ 339,000 | $ 375,000
Charge to (recovery of) cost and expense | 42,000 | (133,000) | 108,000
Amounts written off | 24,000 | 17,000 | 144,000
Balance at end of year | 207,000 | 189,000 | 339,000
Accounts Receivable - Allowance for Customer-Payment Discrepancies [Member] |  |  |
Valuation and Qualifying Accounts Disclosure [Abstract] |  |  |
Balance at beginning of year | 1,206,000 | 1,634,000 | 1,375,000
Charge to (recovery of) cost and expense | 1,507,000 | 1,452,000 | 2,112,000
Amounts written off | 948,000 | 1,880,000 | 1,853,000
Balance at end of year | 1,765,000 | 1,206,000 | 1,634,000
Inventory - Allowance for Excess and Obsolete Inventory [Member] |  |  |
Valuation and Qualifying Accounts Disclosure [Abstract] |  |  |
Balance at beginning of year | 17,372,000 | 16,436,000 | 13,520,000
Charge to (recovery of) cost and expense | 15,009,000 | 16,233,000 | 18,851,000
Amounts written off | 13,417,000 | 15,297,000 | 15,935,000
Balance at end of year | 18,964,000 | 17,372,000 | 16,436,000
Deferred Tax Assets - Valuation Allowance for Deferred Tax Assets [Member] |  |  |
Valuation and Qualifying Accounts Disclosure [Abstract] |  |  |
Balance at beginning of year | 45,399,000 | 7,619,000 | 6,816,000
Charge to (recovery of) cost and expense | 6,834,000 | 37,780,000 | 803,000
Balance at end of year | 52,233,000 | 45,399,000 | 7,619,000
Charged to Other Accounts | $ 0 | $ 0 | $ 0

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