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Income Taxes (Details 3) - USD ($) $ in Thousands | Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2017 | Mar. 31, 2016
--- | --- | --- | --- | ---
Deferred tax liability: |  |  |  |
Property, plant and equipment | $ 32 | $ 32 |  |
Deferred tax asset: |  |  |  |
Tax loss carryforwards | (594) | (474) |  |
Deferred deductible expenses | (74) | (74) |  |
Valuation allowance | 668 | 548 | $ 567 | $ 612
Total net deferred tax asset |  |  |  |
Net deferred tax liability | $ 32 | $ 32 |  |

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