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Employee Stock Compensation and Stock Repurchase Program (Tables) | 6 Months Ended
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Jul. 31, 2017
Share-based Arrangements with Employees and Nonemployees [Abstract] |
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 July 31, |  | Six Months Ended July 31, |
|  | 2017 |  | 2016 |  | 2017 |  | 2016 |
2012 Plan |  | $ | — |  | $ | (13,932) |  | $ | 206 |  | $ | (10,137) |
2015 Plan |  |  | 98,642 |  |  | (38,578) |  |  | 197,284 |  |  | 88,070 |
Total stock-based compensation costs |  | $ | 98,642 |  | $ | (52,510) |  | $ | 197,490 |  | $ | 77,933 |
Total income tax benefit recognized for stock-based compensation arrangements |  | $ | 35,511 |  | $ | (13,888) |  | $ | 71,096 |  | $ | 33,072 |
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] |
Shares issued under 2015 and 2012 Stock Plans |  | Outstanding Unvested Grants at Maximum at Beginning of FY18 |  | Granted during FY18 through July 31, 2017 |  | Becoming Vested during FY18 through July 31, 2017 |  | Forfeited during FY18 through July 31, 2017 |  | Outstanding Unvested Grants at Maximum at End of July 31, 2017 |
Restricted stock grants – employees |  |  | 67,619 |  |  | — |  |  | 40,570 |  |  | 27,049 |  |  | — |
Retainer in stock - directors |  |  | 32,372 |  |  | — |  |  | 27,151 |  |  | — |  |  | 5,221 |
Total restricted stock |  |  | 99,991 |  |  | — |  |  | 67,721 |  |  | 27,049 |  |  | 5,221 |
Weighted average grant date fair value |  | $ | 10.18 |  |  | — |  | $ | 10.18 |  | $ | 10.19 |  | $ | 10.19 |

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: 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=96867065&loc=d3e5047-113901 Reference 3: 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 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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