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Note 12 - Income Taxes (Details Textual) - USD ($) $ in Thousands | Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021
--- | --- | --- | ---
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | $ 92 |  |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | 0 | $ 0 | $ 0
Domestic Tax Authority [Member] |  |  |
Operating Loss Carryforwards, Subject to Section 382 | 1,513 |  |
Domestic Tax Authority [Member] | Research Tax Credit Carryforward [Member] |  |  |
Operating Loss Carryforwards, Subject to Section 382 | $ 1,360 |  |

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- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-15 + Details
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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-15A + Details
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