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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

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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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