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Goodwill and Other Intangible Assets - Goodwill and Other Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified |  |  |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |
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Jan. 31, 2014 | Jan. 31, 2013 | Jan. 31, 2012 | Jan. 31, 2014 Proprietary Rights [Member] | Jan. 31, 2013 Proprietary Rights [Member] | Jan. 31, 2014 Customer Relationships [Member] | Jan. 31, 2013 Customer Relationships [Member] | Jan. 31, 2014 Patents [Member] | Jan. 31, 2013 Patents [Member] | Jan. 31, 2014 Trade Name [Member] | Jan. 31, 2013 Trade Name [Member]
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Weighted Average Remaining Life |  |  |  | 6 years 4 months 24 days |  | 4 years 1 month 6 days |  | 4 years 1 month 6 days |  | 4 years 1 month 6 days |
Goodwill | $ 4,320 | $ 4,320 | $ 4,320 |  |  |  |  |  |  |  |
Gross Carrying Amount | 6,563 | 6,826 |  | 3,577 | 3,503 | 2,159 | 2,402 | 650 | 724 | 177 | 197
Accumulated Amortization | (3,362) | (2,837) |  | (1,900) | (1,625) | (1,057) | (876) | (318) | (264) | (87) | (72)
Net Carrying Amount | $ 3,201 | $ 3,989 | $ 4,696 | $ 1,677 | $ 1,878 | $ 1,102 | $ 1,526 | $ 332 | $ 460 | $ 90 | $ 125

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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=26713463&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=26713463&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=26713463&loc=d3e16323-109275 + Details
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