Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Deferred tax assets:
Accounts receivable	$ 1,790	$ 2,419
Inventories	3,660	6,521
Net operating loss carryforwards	50,928	46,178
Accrued expenses	21,274	29,783
Other assets	16,832	20,282
Gross deferred tax assets	94,484	105,183
Less valuation allowance	(15,255)	(27,053)
Total deferred tax assets	79,229	78,130
Deferred tax liabilities:
Property, plant and equipment	21,045	24,319
Other intangible assets	46,058	67,388
Other liabilities	1,331	759
Total deferred tax liabilities	68,434	92,466
Net deferred tax assets	$ 10,795
Net deferred tax liabilities		$ (14,336)