Accounts Receivable - Net (Details) - USD ($)		Sep. 30, 2018	Mar. 31, 2018
Accounts Receivable, Net [Abstract]
Accounts receivable - trade		$ 77,686,000	$ 83,700,000
Allowance for bad debts		(4,348,000)	(4,142,000)
Customer allowances earned			0
Customer payment discrepancies		(827,000)	(1,110,000)
Customer returns RGA issued		(16,426,000)	(15,274,000)
Customer core returns accruals			0
Less: total accounts receivable offset accounts		(21,601,000)	(20,526,000)
Total accounts receivable - net		$ 56,085,000	63,174,000
As Previously Reported [Member] | ASC 606 [Member]
Accounts Receivable, Net [Abstract]
Accounts receivable - trade			83,700,000
Allowance for bad debts			(4,142,000)
Customer allowances earned			(11,370,000)
Customer payment discrepancies			(1,110,000)
Customer returns RGA issued			(15,274,000)
Customer core returns accruals			(36,066,000)
Less: total accounts receivable offset accounts			(67,962,000)
Total accounts receivable - net			15,738,000
Adoption of ASC 2014-09 [Member] | ASC 606 [Member]
Accounts Receivable, Net [Abstract]
Accounts receivable - trade			0
Allowance for bad debts			0
Customer allowances earned	[1]		11,370,000
Customer payment discrepancies			0
Customer returns RGA issued			0
Customer core returns accruals	[2]		36,066,000
Less: total accounts receivable offset accounts			47,436,000
Total accounts receivable - net			47,436,000
Contract liabilities			4,697,000
Long-term contract liabilities			$ 31,369,000

[1] Customer allowances earned have been reclassified to contract liabilities in the consolidated balance sheet at March 31, 2018.

[2] Customer core returns accruals of $4,697,000 have been reclassified to contract liabilities and customer core returns accruals of $31,369,000 have been reclassified to long-term contract liabilities in the consolidated balance sheet at March 31, 2018.