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Note 14 - Share Capital (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jul. 02, 2014 | Jan. 31, 2016 | Jan. 31, 2015 | Jan. 31, 2014
Note 14 - Share Capital (Details) [Line Items] |  |  |  |
Proceeds from Issuance of Common Stock |  | $ 158 | $ 140,724 | $ 3,633
Proceeds from Stock Options Exercised |  | $ 200 | $ 900 | $ 3,600
Public Offering [Member] |  |  |  |
Note 14 - Share Capital (Details) [Line Items] |  |  |  |
Share Price (in Dollars per share) | $ 13.50 |  |  |
Stock Issued During Period, Shares, New Issues (in Shares) | 10,925,000 |  | 10,925,000 |
Over-Allotment Option | 15.00% |  |  |
Stock Issued During Period, Value, New Issues | $ 147,500 |  |  |
Proceeds from Issuance of Common Stock, Net | 142,100 |  |  |
Proceeds from Issuance of Common Stock | $ 140,700 |  |  |

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