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Interest expense, net (Tables) | 12 Months Ended
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Jan. 31, 2018
Interest expense, net [Abstract] |
Interest expense, net [Table Text Block] | Interest expense, net
(In thousands) | 2017 |  | 2016 |
Interest expense | $808 | $746
Interest income | (111 | ) | (177 | )
Interest expense, net | $697 | $569

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- Definition Interest expense, net [Abstract] + References No definition available. + Details
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Period Type: | duration

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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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Balance Type: | na
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