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Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) | 12 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022
Accounts Receivable - Allowance for Credit Losses [Member] |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of year | $ 339,000 | $ 375,000 | $ 348,000
Charge to (recovery of) cost and expense | (133,000) | 108,000 | 95,000
Amounts written off | 17,000 | 144,000 | 68,000
Balance at end of year | 189,000 | 339,000 | 375,000
Accounts Receivable - Allowance for Customer-Payment Discrepancies [Member] |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of year | 1,634,000 | 1,375,000 | 752,000
Charge to (recovery of) cost and expense | 1,452,000 | 2,112,000 | 2,142,000
Amounts written off | 1,880,000 | 1,853,000 | 1,519,000
Balance at end of year | 1,206,000 | 1,634,000 | 1,375,000
Inventory - Allowance for Excess and Obsolete Inventory [Member] |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of year | 16,436,000 | 13,520,000 | 13,246,000
Charge to (recovery of) cost and expense | 16,233,000 | 18,851,000 | 13,504,000
Amounts written off | 15,297,000 | 15,935,000 | 13,230,000
Balance at end of year | 17,372,000 | 16,436,000 | 13,520,000
Deferred Tax Assets - Valuation Allowance for Deferred Tax Assets [Member] |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of year | 7,619,000 | 6,816,000 | 6,163,000
Charge to (recovery of) cost and expense | 37,780,000 | 803,000 | 653,000
Charged to Other Accounts | 0 | 0 | 0
Balance at end of year | $ 45,399,000 | $ 7,619,000 | $ 6,816,000

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-4 + Details
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