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Share capital (Tables)
 6 Months Ended
May 31, 2016
Schedule of Common Shares Issued and Outstanding [Table Text Block]
    in thousands of dollars, except share amounts  
    Number of shares     Ascribed value  
          $   
November 30, 2014   60,296,365     111,833  
Issued pursuant to the Sunward Arrangement   43,116,312     22,851  
Exercise of options   7,499     7  
Exercise of Sunward Arrangement Options   347,999     177  
Restricted Share Units   795,368     819  
Deferred Share Units   232,878     353  
November 30, 2015   104,796,421     136,040  
Exercise of options   45,054     14  
Restricted Share Units   108,399     34  
Deferred Share Units   75,000     29  
May 31, 2016, issued and outstanding   105,024,874     136,117  
Schedule of Stock Options, Valuation Assumptions [Table Text Block]
    May 31, 2016  
Risk-free interest rates   0.52%  
Exercise price   CAD$0.44  
Expected life   3.0 years  
Expected forfeiture rate   0 - 5%  
Expected volatility   59.38%  
Expected dividends   nil  
Schedule of Stock Options Activity [Table Text Block]
          May 31, 2016  
          Weighted average  
          exercise price  
    Number of options     $   
Balance – beginning of period   5,288,350     0.57  
Granted   1,785,000     0.32  
Exercise of options   (100,000 )   0.38  
Forfeited   (300,000 )   0.70  
Balance – end of period   6,673,350     0.51  
Schedule of Disclosure of Stock Options Outstanding [Table Text Block]
                Outstanding           Exercisable     Unvested  
                Weighted           Weighted        
    Number of     Weighted     average     Number of     average     Number of  
    outstanding     average years     exercise price     exercisable     exercise price     unvested  
Range of price   options     to expiry     $      options     $      options  
$0.50 to $0.99   6,618,350     4.03     0.52     4,236,101     0.53     2,382,249  
$1.00 to $1.59   55,000     1.92     1.51     55,000     1.51     -  
    6,673,350     4.01     0.51     4,291,101     0.55     2,382,249  
Schedule of NovaGold Arrangement Options Activity [Table Text Block]
          May 31, 2016  
          Weighted average  
          exercise price  
    Number of options     $    
Balance – beginning of period   509,272     4.77  
Forfeited   (14,574 )   5.04  
Expired   (169,878 )   5.75  
Balance – end of period   324,820     4.39  
Schedule of NovaGold Arrangement Stock Options Outstanding [Table Text Block]
          Outstanding and exercisable  
                Weighted average  
    Number of outstanding     Weighted average years     exercise price  
Range of price   and exercisable options     to expiry     $    
$2.88 to $3.99   49,998     0.83     2.98  
$4.00 to $5.99   258,156     0.52     4.52  
$6.00 to $6.61   16,666     1.00     6.61  
    324,820     0.59     4.39  
Schedule of Unit Plans and Changes Activity [Table Text Block]
    Number of RSUs     Number of DSUs  
Balance – beginning of period   -     904,603  
Granted   600,000     110,760  
Vested/paid   (199,999 )   (75,000 )
Balance – end of period   400,001     940,363  
Schedule of Warrants, Activity [Table Text Block]
                Weighted average  
    Number of     Weighted average     exercise price  
    Warrants     years to expiry     $    
Balance – beginning of period   6,521,740     3.60     1.60  
Balance – end of period   6,521,740     3.10     1.60