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Note 9 - Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands | Jan. 31, 2017 | Jan. 31, 2016
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Intangible assets, cost | $ 271,874 | $ 232,403
Intangible assets, amortization cost | 126,429 | 98,841
Intangible assets. net | 145,445 | 133,562
Customer Relationships [Member] |  |
Intangible assets, cost | 125,057 | 107,743
Intangible assets, amortization cost | 56,509 | 45,853
Developed Technology Rights [Member] |  |
Intangible assets, cost | 137,587 | 117,586
Intangible assets, amortization cost | 64,879 | 48,295
Trade Names [Member] |  |
Intangible assets, cost | 6,314 | 4,515
Intangible assets, amortization cost | 3,335 | 3,128
Noncompete Agreements [Member] |  |
Intangible assets, cost | 2,916 | 2,559
Intangible assets, amortization cost | $ 1,706 | $ 1,565

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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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