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Accounts Receivable - Net (Details) - USD ($) | 6 Months Ended |
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Mar. 31, 2021
Components of accounts receivable [Abstract] |  |  |
Accounts receivable - trade | $ 75,775,000 |  | $ 81,549,000
Allowance for credit losses | (326,000) |  | (348,000)
Customer payment discrepancies | (1,176,000) |  | (752,000)
Customer returns RGA issued | (13,610,000) |  | (17,327,000)
Total accounts receivable - net | 60,663,000 |  | $ 63,122,000
Allowance for credit losses [Roll Forward] |  |  |
Balance at beginning of period | 348,000 | $ 4,252,000 |
Provision for expected credit losses | 17,000 | 228,000 |
Recoveries | 0 | (100,000) |
Amounts written off charged against the allowance | (39,000) | (3,897,000) |
Balance at end of period | $ 326,000 | $ 483,000 |

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