Components of Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Current:
Accounts receivable reserves	$ 842	$ 881
Inventory reserves	401	401
Accruals	151	237
Stock warrants	0	166
Total current deferred tax assets	1,394	1,685
Non-current:
Property, plant, and equipment	669	1,169
Net operating loss and credit carry forwards	1,084	107
Stock compensation	0	79
Total non-current deferred tax assets - gross	1,753	1,355
Valuation allowances	0	(234)
Total non-current deferred tax assets	1,753	1,121
Total deferred tax assets	3,147	2,806
Non-current:
Capital lease expense	0	194
Total deferred tax liabilities	0	194
Net deferred tax assets	$ 3,147	$ 2,612