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Note 9 - Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Jan. 31, 2020	Jan. 31, 2019
Intangible assets, cost	$ 507,695	$ 375,792
Intangible assets, amortization cost	250,739	199,600
Intangible assets. net	256,956	176,192
Customer Relationships [Member]
Intangible assets, cost	226,514	177,224
Intangible assets, amortization cost	98,241	82,028
Developed Technology Rights [Member]
Intangible assets, cost	262,614	184,641
Intangible assets, amortization cost	142,757	110,051
Trade Names [Member]
Intangible assets, cost	8,582	7,754
Intangible assets, amortization cost	5,124	4,456
Noncompete Agreements [Member]
Intangible assets, cost	9,985	6,173
Intangible assets, amortization cost	$ 4,617	$ 3,065

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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- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
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