Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Deferred tax assets:
Net operating loss carry forwards	$ 3,674	$ 4,546
Compensation accrual	134	322
Inventory differences	14	41
Tax credit carry forwards	156	115
Other	12	11
Gross deferred tax assets	3,990	5,035
Less valuation allowance		(2,994)
Net deferred tax assets	3,990	2,041
Deferred tax liability: Depreciation and amortization	(451)	(597)
Net deferred tax assets	$ 3,539	$ 1,444