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Stockholders’ Equity (Tables) | 9 Months Ended
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Oct. 31, 2017
Equity [Abstract] |
Schedule of Nonvested Share Activity [Table Text Block] | The following table summarizes the unvested shares granted on September 12, 2017, which have been made under the 2017 Plan.
|  | Number of shares awarded total |
|  | Minimum |  | Target |  | Maximum |  | Cap |
Employees |  |  | 21,145 |  |  | 31,718 |  |  | 42,291 |  |  | 50,748 |
Non-Employee Directors |  |  | 7,246 |  |  | 10,870 |  |  | 14,493 |  |  | 17,391 |
Total |  |  | 28,391 |  |  | 42,588 |  |  | 56,784 |  |  | 68,139 |
|  | Value at grant date (numbers below are rounded to the nearest $100) |
|  | Minimum |  | Target |  | Maximum |  | Cap |
Employees |  | $ | 291,800 |  | $ | 437,700 |  | $ | 583,600 |  | $ | 700,300 |
Non-Employee Directors |  |  | 100,000 |  |  | 150,000 |  |  | 200,000 |  |  | 240,000 |
Total |  | $ | 391,800 |  | $ | 587,700 |  | $ | 783,600 |  | $ | 940,300 |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] | The Company recognized total stock-based compensation costs , which are reflected in operating expenses:
|  | Three Months Ended October 31, |  | Nine Months Ended October 31, |
|  | 2017 |  | 2016 |  | 2017 |  | 2016 |
2012 Plan |  | $ | — |  | $ | 392 |  | $ | 206 |  | $ | (9,756) |
2015 Plan |  |  | — |  |  | 98,642 |  |  | 197,284 |  |  | 186,712 |
2017 Plan |  |  | 93,981 |  |  | — |  |  | 93,981 |  |  | — |
Total stock-based compensation |  | $ | 93,981 |  | $ | 99,034 |  | $ | 291,471 |  | $ | 176,966 |
Total income tax benefit recognized for stock-based compensation arrangements |  | $ | 33,833 |  | $ | 35,652 |  | $ | 104,929 |  | $ | 63,708 |
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] |
Shares issued under 2017, 2015 and 2012 Stock Plans |  | Outstanding Unvested Grants at Maximum at Beginning of FY18 |  | Granted during FY18 through October 31, 2017 |  | Becoming Vested during FY18 through October 31, 2017 |  | Forfeited during FY18 through October 31, 2017 |  | Outstanding Unvested Grants at Maximum at End of October 31, 2017 |
Restricted stock grants – employees |  |  | 67,619 |  |  | 42,291 |  |  | 40,570 |  |  | 27,049 |  |  | 42,291 |
Restricted stock grants – non-employee directors |  |  | — |  |  | 14,493 |  |  | — |  |  | — |  |  | 14,493 |
Retainer in stock – non-employee directors |  |  | 32,372 |  |  | 2,674 |  |  | 27,151 |  |  | — |  |  | 7,895 |
Total restricted stock |  |  | 99,991 |  |  | 59,458 |  |  | 67,721 |  |  | 27,049 |  |  | 64,679 |
Weighted average grant date fair value |  | $ | 10.18 |  | $ | 13.89 |  | $ | 10.18 |  | $ | 10.19 |  | $ | 13.59 |

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