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Note 14 - Income Taxes (Details Textual) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2018
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total | $ 19 | $ 40 | $ 24
Domestic Tax Authority [Member] |  |  |
Open Tax Year | 2016 2017 2018 2019 |  |
State and Local Jurisdiction [Member] |  |  |
Open Tax Year | 2016 2017 2018 2019 |  |
Foreign Tax Authority [Member] |  |  |
Open Tax Year | 2015 2016 2017 2018 2019 |  |
Operating Loss Carryforwards, Total | $ 8,874 |  |
Tax Credit Carryforward, Amount | 15 |  |
Foreign Tax Authority [Member] | Canada Revenue Agency [Member] |  |  |
Undistributed Earnings of Foreign Subsidiaries | $ 12,900 |  |

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