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Income Taxes (Narrative) (Details) - USD ($) | 3 Months Ended
--- | ---
Apr. 30, 2017 | Apr. 30, 2016
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] |  |
Income tax (benefit) expense | $ (1,349,000) | $ 29,000
Loss before income taxes | $ (3,560,000) | $ (3,109,000)
Effective tax rate (percent) | 37.90% |
Reasonably possible decrease in unrecognized tax benefits | $ 9,000 |
Accounting Standards Update 2016-09 [Member] |  |
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] |  |
Unrecognized excess tax benefits reversed | $ 172,000 |

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