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Note 6 - Goodwill and Other Intangibles - Intangible Assets (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Mar. 31, 2020
Accumulated Amortization | $ (3,306) | $ (2,420)
Net Book Value | $ 9,364 |
Estimated Useful Life (Year) |  |
Intangible assets, gross amount | $ 13,270 | 5,970
Intangible assets, net | 9,964 | 3,550
Trade Names [Member] |  |
Trade name | 600 |
Backlog [Member] |  |
Gross Amount | 600 |
Accumulated Amortization | (285) |
Net Book Value | $ 315 |
Estimated Useful Life (Year) | 2 years |
Customer Relationships [Member] |  |
Gross Amount | $ 6,100 |
Accumulated Amortization | (239) |
Net Book Value | $ 5,861 |
Estimated Useful Life (Year) | 7 years |
Core Technology and Know-how [Member] |  |
Gross Amount | $ 5,970 | 5,970
Accumulated Amortization | (2,782) | (2,420)
Net Book Value | $ 3,188 | $ 3,550
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 http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + 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 http://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 http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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