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Segment Reporting (Details Textual) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2013 | Oct. 31, 2012 | Jul. 31, 2012 | Apr. 30, 2012 | Jan. 31, 2012 | Oct. 31, 2011 | Jul. 31, 2011 | Apr. 30, 2011 | Jan. 31, 2013 | Jan. 31, 2012 | Jan. 31, 2011
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 28,401,000 | $ 18,574,000 | $ 23,080,000 | $ 34,630,000 | $ 37,034,000 | $ 28,020,000 | $ 21,278,000 | $ 26,502,000 | $ 104,685,000 | $ 112,834,000 | $ 71,363,000
Segment Reporting (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Reduction in capital expenditures and fixed assets |  |  |  |  |  |  |  |  | 349,000 | 272,000 | 292,000
Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 1,041,000 | $ 297,000 | $ 1,117,000

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- Definition Reduction in capital expenditures and fixed assets. + References No definition available. + Details
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- Definition Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains. + 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=6880815&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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