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Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) | 12 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2020
Accounts Receivable - Allowance for Credit Losses [Member] |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of year | $ 348,000 | $ 4,252,000 | $ 4,100,000
Charge to (recovery of) cost and expense | 95,000 | (1,000) | 610,000
Amounts written off | 68,000 | 3,903,000 | 458,000
Balance at end of year | 375,000 | 348,000 | 4,252,000
Accounts Receivable - Allowance for Customer-Payment Discrepancies [Member] |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of year | 752,000 | 1,040,000 | 854,000
Charge to (recovery of) cost and expense | 2,142,000 | 694,000 | 1,626,000
Amounts written off | 1,519,000 | 982,000 | 1,440,000
Balance at end of year | 1,375,000 | 752,000 | 1,040,000
Inventory - Allowance for Excess and Obsolete Inventory [Member] |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of year | 13,246,000 | 13,208,000 | 11,899,000
Charge to (recovery of) cost and expense | 13,504,000 | 12,803,000 | 13,372,000
Amounts written off | 13,230,000 | 12,765,000 | 12,063,000
Balance at end of year | $ 13,520,000 | $ 13,246,000 | $ 13,208,000

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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- Definition Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column C)(1)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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- Definition Amount of decrease in valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column D)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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