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Note 10 - Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021
Accumulated Amortization | $ (10,350) | $ (7,727)
Net Book Value | 9,511 |
Intangible assets, gross amount | 21,661 | 16,880
Intangible assets, net | 11,311 | 9,153
Trademarks and Trade Names [Member] |  |
Trade names and trademarks | 1,800 | 600
Licensing Agreements [Member] |  |
Gross Amount | 3,610 | 3,610
Accumulated Amortization | (3,610) | (3,610)
Net Book Value | $ 0 | 0
Estimated Useful Life (Year) | 7 years |
Backlog [Member] |  |
Gross Amount | $ 681 | 600
Accumulated Amortization | (631) | (475)
Net Book Value | $ 50 | 125
Estimated Useful Life (Year) | 2 years |
Customer Relationships [Member] |  |
Gross Amount | $ 9,600 | 6,100
Accumulated Amortization | (2,723) | (739)
Net Book Value | $ 6,877 | 5,361
Estimated Useful Life (Year) | 7 years |
Core Technology and Know-how [Member] |  |
Gross Amount | $ 5,970 | 5,970
Accumulated Amortization | (3,386) | (2,903)
Net Book Value | $ 2,584 | $ 3,067
Core Technology and Know-how [Member] | Minimum [Member] |  |
Estimated Useful Life (Year) | 5 years |
Core Technology and Know-how [Member] | Maximum [Member] |  |
Estimated Useful Life (Year) | 10 years |

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(16)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 928 -SubTopic 340 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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