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Segment Reporting - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2014 | Oct. 31, 2013 | Jul. 31, 2013 | Apr. 30, 2013 | Jan. 31, 2013 | Oct. 31, 2012 | Jul. 31, 2012 | Apr. 30, 2012 | Jan. 31, 2014 | Jan. 31, 2013 | Jan. 31, 2012
Schedule Of Sales Revenue By Business Segment [Line Items] |  |  |  |  |  |  |  |  |  |  |
Reduction in capital expenditures and fixed assets |  |  |  |  |  |  |  |  | $ 32 | $ 349 | $ 272
Revenues | 23,647 | 20,275 | 20,895 | 27,291 | 28,401 | 18,574 | 23,080 | 34,630 | 92,108 | 104,685 | 112,834
Intersegment Sales Elimination [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule Of Sales Revenue By Business Segment [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 166 | $ 1,041 | $ 297

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- Definition Reduction in capital expenditures and fixed assets. + References No definition available. + Details
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- Details
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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