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Retirement plans Plan assets (Tables) | 12 Months Ended
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Jan. 31, 2017
Compensation and Retirement Disclosure [Abstract] |
Schedule of Allocation of Plan Assets [Table Text Block] |
Level 1 market value of plan assets | 2016 |  | 2015 |
Equity securities | $3,000 | $3,062
U.S. bond market | 2,188 | 2,168
Real estate securities | 214 |  | — |
Subtotal | 5,402 | 5,230
Level 2 significant other observable inputs |  |
Money market fund | $306 | $351
Equity securities | 520 | 302
Subtotal | 826 | 653
Total | $6,228 | $5,883

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- Definition Tabular disclosure of the major categories of plan assets of pension plans and/or other employee benefit plans. This information may include, but is not limited to, the target allocation of plan assets, the fair value of each major category of plan assets, and the level within the fair value hierarchy in which the fair value measurements fall. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(5) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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