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Note 8 - General and Administrative Expenses (Tables)
 6 Months Ended
May 31, 2017
Notes Tables  
General and Administrative Expenses [Table Text Block]
    Three months ended May 31,   Six months ended May 31,
    2017   2016   2017   2016
Salaries   $
1,556
     $
1,624
     $
3,275
     $
3,316
  
Share-based compensation    
2,049
      
1,869
      
5,974
      
6,577
  
Office expense    
519
      
551
      
1,064
      
1,055
  
Professional fees    
159
      
142
      
462
      
268
  
Corporate communications and regulatory    
494
      
375
      
723
      
669
  
Depreciation    
9
      
8
      
19
      
17
  
    $
4,786
     $
4,569
     $
11,517
     $
11,902