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Note 9 - Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands | Jan. 31, 2018 | Jan. 31, 2017
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Intangible assets, cost | $ 350,790 | $ 271,874
Intangible assets, amortization cost | 172,789 | 126,429
Intangible assets. net | 178,001 | 145,445
Customer Relationships [Member] |  |
Intangible assets, cost | 162,772 | 125,057
Intangible assets, amortization cost | 73,621 | 56,509
Developed Technology Rights [Member] |  |
Intangible assets, cost | 174,506 | 137,587
Intangible assets, amortization cost | 92,304 | 64,879
Trade Names [Member] |  |
Intangible assets, cost | 7,532 | 6,314
Intangible assets, amortization cost | 4,221 | 3,335
Noncompete Agreements [Member] |  |
Intangible assets, cost | 5,980 | 2,916
Intangible assets, amortization cost | $ 2,643 | $ 1,706

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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/presentationRef -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/presentationRef -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 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/presentationRef -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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