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Note 14 - Income Taxes (Details Textual) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2019
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total | $ 0 | $ 19 | $ 40
Effective Income Tax Rate Reconciliation, Foreign-derived Intangible Income Deduction Based on Updated Treasury Regulations, Amount | $ 630 |  |
Effective Income Tax Rate Reconciliation, Foreign-derived Intangible Income Deduction, Percentage | 6.00% |  |
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | $ 64 |  |
State and Local Jurisdiction [Member] |  |  |
Open Tax Year | 2018 2019 2020 |  |
Operating Loss Carryforwards, Total | $ 11,449 |  |
Domestic Tax Authority [Member] |  |  |
Open Tax Year | 2017 2018 2019 2020 |  |
Operating Loss Carryforwards, Total | $ 11,936 |  |
Domestic Tax Authority [Member] | Research Tax Credit Carryforward [Member] |  |  |
Tax Credit Carryforward, Amount | $ 153 |  |
Foreign Tax Authority [Member] |  |  |
Open Tax Year | 2017 2018 2019 2020 |  |
Operating Loss Carryforwards, Total | $ 27,547 |  |
Tax Credit Carryforward, Amount | 16 |  |
Foreign Tax Authority [Member] | Canada Revenue Agency [Member] |  |  |
Undistributed Earnings of Foreign Subsidiaries | $ 9,951 | $ 12,900 |

X
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign-derived intangible income deduction based on updated treasury regulations. + References No definition available. + Details
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign-derived intangible income deduction. + References No definition available. + Details
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- Definition Tax year that remains open to examination under enacted tax laws, in YYYY format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319 + Details
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- Definition The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319 + Details
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- Definition Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the country of domicile. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 740 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6487024&loc=d3e29054-158556 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 740 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6479915&loc=d3e66715-112838 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=123452999&loc=d3e28200-109314 + Details
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