Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Deferred tax assets:
Accounts receivable	$ 1,110	$ 1,297
Inventories	5,010	4,081
Net operating loss carryforwards	44,340	48,423
Accrued expenses	26,113	21,574
Deferred Tax Assets, Deferred Expense, Capitalized Research and Development Costs	0	7,061
Other assets	19,793	17,656
Gross deferred tax assets	96,366	100,092
Less valuation allowance	(20,951)	(17,519)
Total deferred tax assets	75,415	82,573
Deferred tax liabilities:
Property, plant and equipment	30,229	25,656
Intangible assets	66,529	96,826
Other liabilities	1,217	1,737
Total deferred tax liabilities	97,975	124,219
Net deferred tax liabilities	$ (22,560)	$ (41,646)