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Income Taxes (Detail Textuals) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Schedule Of Income Taxes [Line Items] |  |
Revaluation of net deferred tax asset | $ 3.1 |
Decrease in effective tax rate | 20.50% | 134.70%
Undistributed earnings | $ 3.6 |
U.S. federal |  |
Schedule Of Income Taxes [Line Items] |  |
Income tax net operating loss carryforwards | 1.9 |
State and Municipal |  |
Schedule Of Income Taxes [Line Items] |  |
Income tax net operating loss carryforwards | $ 0.4 |
Operating loss carryforwards, earliest expiration date | Mar. 31, 2020 |

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