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Note 11 - Income Taxes - Components of Net Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Mar. 31, 2017 | Mar. 31, 2016
--- | --- | ---
Current deferred tax assets: |  |
Accrued employee-related expenses | $ 242 | $ 257
Allowances and reserves | 132 | 217
Stock option deductible differences | 898 | 606
Inventory | 691 | 533
Currency translation adjustment |  | 12
Net operating loss |  | 110
Other | 9 | 3
| 1,972 | 1,738
Property, plant and equipment | (1,635) | (1,599)
Goodwill and intangible assets | (3,807) | (4,335)
Currency translation adjustment | (3) |
Other | (81) | (5)
| (5,526) | (5,939)
Net deferred tax liability | $ (3,554) | $ (4,201)

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