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Stock Option Plans (Tables) | 6 Months Ended
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Jul. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price [Table Text Block] | The following table summarizes options granted, exercised and canceled or expired during the six months ended July 31, 2014:
|  | Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term (in years) |  |  | Aggregate Intrinsic Value (in thousands) |
Outstanding at January 31, 2014 |  |  | 83,330 |  |  | $ | 12.37 |  |  |  |  |  |  |  |  |
Exercised |  |  | (83,330 | ) |  | $ | 12.37 |  |  |  |  |  |  |  |  |
Outstanding and exercisable at July 31, 2014 |  |  | — |  |  | $ | — |  |  |  | — |  |  | $ | — |

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- Definition Share based compensation arrangement by share based payment award options grants in period weighted average exercise price. + References No definition available. + Details
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