Income Taxes - Deferred Income Tax Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Deferred income tax assets:
Accounts receivable	$ 0	$ 85
Inventories	658	2,681
Accrued expenses	3,223	2,519
State net operating loss and credit carryforwards	8,579	8,547
Share-based compensation	2,455	2,358
Gross Deferred income tax assets	14,915	16,190
Valuation allowance	(8,608)	(8,468)
Net	6,307	7,722
Deferred income tax liabilities:
Intangibles	3,108	136
Property, plant and equipment	4,391	1,786
Unremitted earnings of foreign subsidiaries	2,539	2,333
Other	699	274
Gross Deferred income tax liabilities	10,737	4,529
Net deferred income tax (liability) asset	$ (4,430)
Net deferred income tax (liability) asset		$ 3,193