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Accounts Receivable - Net (Details) - USD ($) | Dec. 31, 2019 | Mar. 31, 2019
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Accounts Receivable - Net [Abstract] |  |
Accounts receivable - trade | $ 66,514,000 | $ 75,847,000
Less: total accounts receivable offset accounts [Abstract] |  |
Allowance for bad debts | (4,485,000) | (4,100,000)
Customer payment discrepancies | (1,127,000) | (854,000)
Customer returns RGAs issued | (7,972,000) | (14,878,000)
Total accounts receivable - net | $ 52,930,000 | $ 56,015,000

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