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Accounts Receivable - Net (Details) - USD ($)
Mar. 31, 2017
Mar. 31, 2016
Accounts Receivable - Net [Abstract]    
Accounts receivable - trade $ 76,902,000 $ 62,206,000
Allowance for bad debts (4,140,000) (4,284,000)
Customer allowances earned (7,880,000) (12,029,000)
Customer payment discrepancies (751,000) (703,000)
Customer returns RGA issued (12,710,000) (6,561,000)
Customer core returns accruals (25,404,000) (30,081,000)
Less: total accounts receivable offset accounts (50,885,000) (53,658,000)
Total accounts receivable - net $ 26,017,000 $ 8,548,000