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Interest expense, net (Tables) | 12 Months Ended
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Jan. 31, 2017
Interest expense, net [Abstract] |
Interest expense, net [Table Text Block] | Interest expense, net
| 2016 |  | 2015 |
Interest expense | $746 | $950
Interest income | (177 | ) | (480 | )
Interest expense, net | $569 | $470

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- Definition Interest expense, net [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of interest income and expense, including, but not limited to, interest income and expense from investments, loans, and securities. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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