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Stock-Based Compensation (Details Textual) (USD $) | 3 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended |  |  | 6 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Jul. 31, 2013 | Jul. 31, 2012 | Jul. 31, 2013 | Jul. 31, 2012 | Jan. 31, 2013 | Jul. 31, 2013 Stock Option Plan [Member] | Jul. 31, 2013 Stock Plan [Member] | Jun. 30, 2013 Stock Plan [Member] Maximum [Member] | Jun. 30, 2013 Stock Plan [Member] Minimum [Member] | Jul. 31, 2013 Two plans [Member] | Jul. 31, 2013 ISOs [Member] | Jul. 31, 2013 NSOs [Member] | Jul. 31, 2013 Employee Stock Option [Member]
Stock-Based Compensation (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares of common stock authorized for grant during the period |  |  |  |  |  |  |  | 1,250,000 | 500,000 | 1,717,500 |  |  |
Number of shares of common stock available for award at January 31, 2013 |  |  |  |  |  |  | 750,500 |  |  |  |  |  |
Expiration dates of stock incentive plans |  |  |  |  |  | 2011-07 | 2021-07 |  |  |  |  |  |
Incentive stock option award maximum expiration period |  |  |  |  |  |  |  |  |  |  | 10 years | 10 years |
Incentive stock option award minimum expiration period |  |  |  |  |  |  |  |  |  |  | 7 years |  |
Period to become exercisable |  |  |  |  |  |  |  |  |  |  | 1 year | 1 year |
Compensation expense recognize |  |  |  |  |  |  |  |  |  |  |  |  | 11 months
Stock-Based Compensation (Additional Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation expense | $ 322,000 | $ 332,000 | $ 759,000 | $ 568,000 |  |  |  |  |  |  |  |  |
Unrecognized compensation cost | 558,000 |  | 558,000 |  |  |  |  |  |  |  |  |  |
Intrinsic value of the stock options exercised |  |  | 546,000 | 157,000 |  |  |  |  |  |  |  |  |
Intrinsic value of outstanding stock options | 860,000 |  | 860,000 |  |  |  |  |  |  |  |  |  |
Intrinsic value of exercisable stock options | $ 1,388,000 |  | $ 1,388,000 |  |  |  |  |  |  |  |  |  |
Method used for fair value assumption |  |  | Black-Scholes option-pricing model |  |  |  |  |  |  |  |  |  |
Conversion price for outstanding warrants | 7.75 |  | 7.75 |  |  |  |  |  |  |  |  |  |
Shares exercised related to warrants |  |  | 64,000 |  | 160,000 |  |  |  |  |  |  |  |
Warrants outstanding |  |  |  |  | 0 |  |  |  |  |  |  |  |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition For each plan, identification of the award pricing model or other valuation method used in calculating the weighted average fair values disclosed. The model is also used to calculate the compensation expense that is shown within the balance sheet, income statement, and cash flow. Examples of valuation techniques are lattice models (binomial model), closed-form models (Black-Scholes-Merton formula), and a Monte Carlo simulation technique. Fair value is the amount at which an asset or liability could be bought or incurred or sold or settled in a current transaction between willing parties, that is, other than in a forced or liquidation sale. May include disclosures about the assumptions underlying application of the method selected. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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