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Earnings per share | 6 Months Ended
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Jul. 31, 2016
Earnings Per Share [Abstract] |
Earnings per share [Text Block] | Earnings per share.
| Three Months Ended July 31, | Six Months Ended July 31,
| 2016 |  | 2015 |  | 2016 |  | 2015 |
Basic weighted average common shares outstanding | 7,481 |  | 7,277 |  | 7,416 |  | 7,264 |
Dilutive effect of equity compensation plans | 122 |  | — |  | — |  | — |
Weighted average common shares outstanding assuming full dilution | 7,603 |  | 7,277 |  | 7,416 |  | 7,264 |
Stock options not included in the computation of diluted earnings per share of common stock because the option exercise prices exceeded the average market prices of the common shares | 356 |  | 740 |  | 378 |  | 672 |
Stock options with an exercise price below the average market price | 248 |  | 16 |  | 226 |  | 84 |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=32703322&loc=d3e4984-109258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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