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Note 14 - Share Capital (Tables)
 12 Months Ended
Jan. 31, 2016
Share Capital [Abstract]  
Schedule of Common Stock Outstanding Roll Forward [Table Text Block]
(thousands of shares)   January 31,
2016		     January 31,
2015		     January 31,
2014		  
Balance, beginning of year     75,480       63,661       62,654  
Shares issued:                        
Stock options and share units exercised     281       478       1,007  
Issuance of common shares     -       10,925       -  
Acquisitions (Note 3)     -       416       -  
Balance, end of year     75,761       75,480       63,661