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Operating Efficiency Initiatives and Other Items (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Jan. 31, 2016 | Apr. 30, 2015 | Jan. 31, 2017 | Jan. 31, 2016
Restructuring And Related Activities [Abstract] |  |  |  |
Operating efficiency initiatives and other items | $ 1,300 | $ 2,700 |  | $ 3,996
Operating efficiency initiatives and other items, completion date |  |  | Jan. 31, 2016 |

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