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Note 8 - Goodwill and Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019
Carrying Amount | $ 169,123 | $ 74,208
Accumulated Amortization | (49,252) | (40,989)
Net | $ 119,871 | 33,219
Minimum [Member] |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 3 years |
Maximum [Member] |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 16 years |
Intellectual Property [Member] |  |
Carrying Amount | $ 15,731 | 7,690
Accumulated Amortization | (6,454) | (5,301)
Net | $ 9,277 | 2,389
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (Year) | 9 years 182 days |
Intellectual Property [Member] | Minimum [Member] |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 10 years |
Intellectual Property [Member] | Maximum [Member] |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 15 years |
Trade Names [Member] |  |
Carrying Amount | $ 5,839 | 3,739
Accumulated Amortization | (2,855) | (2,542)
Net | $ 2,984 | 1,197
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (Year) | 4 years 146 days |
Trade Names [Member] | Minimum [Member] |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 5 years |
Trade Names [Member] | Maximum [Member] |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 10 years |
Customer Relationships [Member] |  |
Carrying Amount | $ 146,106 | 61,198
Accumulated Amortization | (38,777) | (31,584)
Net | $ 107,329 | 29,614
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (Year) | 9 years 182 days |
Customer Relationships [Member] | Minimum [Member] |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 5 years |
Customer Relationships [Member] | Maximum [Member] |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 10 years |
Noncompete Agreements [Member] |  |
Carrying Amount | $ 1,447 | 1,581
Accumulated Amortization | (1,166) | (1,562)
Net | $ 281 | $ 19
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (Year) | 4 years 146 days |
Noncompete Agreements [Member] | Minimum [Member] |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 5 years |
Noncompete Agreements [Member] | Maximum [Member] |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 10 years |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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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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