Accounts Receivable - Net (Details) - USD ($)	Dec. 31, 2016	Mar. 31, 2016
Accounts Receivable - Net [Abstract]
Accounts receivable - trade	$ 71,428,000	$ 62,206,000
Allowance for bad debts	(4,137,000)	(4,284,000)
Customer allowances earned	(9,274,000)	(12,029,000)
Customer payment discrepancies	(1,173,000)	(703,000)
Customer returns RGA issued	(10,645,000)	(6,561,000)
Customer core returns accruals	(23,532,000)	(30,081,000)
Less: total accounts receivable offset accounts	(48,761,000)	(53,658,000)
Total accounts receivable - net	$ 22,667,000	$ 8,548,000