XML 55 R27.htm IDEA: XBRL DOCUMENT
v3.3.0.814

Earnings per share (Tables) | 9 Months Ended
--- | ---
Oct. 31, 2015
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
| Three Months Ended October 31, | Nine Months Ended October 31,
| 2015 |  | 2014 |  | 2015 |  | 2014 |
Basic weighted average common shares outstanding | 7,290 |  | 7,290 |  | 7,273 |  | 7,238 |
Dilutive effect of equity compensation plans | 77 |  | — |  | — |  | 99 |
Weighted average common shares outstanding assuming full dilution | 7,367 |  | 7,290 |  | 7,273 |  | 7,337 |
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 | 753 |  | 346 |  | 743 |  | 257 |
Stock options with an exercise price below the average market price | — |  | 421 |  | 10 |  | 510 |

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_EarningsPerShareBasicLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
Name: | us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration