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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

X

- 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

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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

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
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-Name Accounting Standards Codification
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