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Note 9 - Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Intangible assets, cost	$ 555,423	$ 507,695
Intangible assets, amortization cost	315,431	250,739
Intangible assets. net	239,992	256,956
Customer Relationships [Member]
Intangible assets, cost	240,479	226,514
Intangible assets, amortization cost	119,361	98,241
Developed Technology Rights [Member]
Intangible assets, cost	295,161	262,614
Intangible assets, amortization cost	183,539	142,757
Trade Names [Member]
Intangible assets, cost	8,844	8,582
Intangible assets, amortization cost	5,996	5,124
Noncompete Agreements [Member]
Intangible assets, cost	10,939	9,985
Intangible assets, amortization cost	$ 6,535	$ 4,617

X

- 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

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X

- 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

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-Section 50
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-Subparagraph (a)(1)
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- Definition

Amount after 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 926
-SubTopic 20
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=120154696&loc=d3e54445-107959

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