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NOTE 15. STOCK-BASED COMPENSATION (Tables)
12 Months Ended
Nov. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Recognized stock-based compensation
    Years ended November 30,  
    2015     2014     2013  
Stock options   $ 4,736     $ 6,062     $ 8,135  
Performance share unit plan     4,537       3,944       3,935  
Deferred share unit plan     215       191       234  
    $ 9,488     $ 10,197     $ 12,304  
Stock Options, Valuation Assumptions
  Years ended November 30,
  2015   2014   2013
Share price (C$) 3.18   2.90   4.40
Average risk-free interest rate 1.06%   1.18%   1.07%
Exercise price (C$) 3.18   2.90   4.40
Expected life (years) 3   3   3
Expected volatility 60%   60%   56%
Expected dividends Nil   Nil   Nil
Fair value per share of options granted (C$) 1.28   1.18   1.72
Summary of stock options activity
  2015   2014   2013
  Number of shares (thousands)   Weighted average exercise price (C$)   Number of shares (thousands)   Weighted average exercise price (C$)   Number of shares (thousands)   Weighted average exercise price (C$)
Outstanding at beginning of year 15,219   5.47   15,223   6.54   13,903   7.08
Granted 4,360   3.18   6,109   2.90   3,218   4.40
Exercised (393)   3.46   (1,285)   2.24   (121)   2.23
Forfeited and expired (1,336)   7.38   (4,828)   6.45   (1,777)   7.22
Outstanding at end of year 17,850   4.81   15,219   5.47   15,223   6.54
Exercisable at year-end 14,092       11,644       12,715    
                       
Stock options outstanding and exercisable
    Stock options - issued and outstanding   Stock options - exercisable
Range of price (C$)   Number of outstanding options (thousands)   Weighted average years to expiry   Weighted average exercise price (C$)   Number of exercisable options (thousands)   Weighted average exercise price (C$)
2.90 to 3.99   10,168   3.48   3.02   6,411   2.99
4.00 to 5.99   4,138   1.93   4.59   4,138   4.59
6.00 to 7.99   800   1.45   6.36   800   6.36
10.00 to 11.99   1,712   0.96   10.24   1,711   10.24
12.00 to 13.99   932   0.12   13.02   932   13.02
14.00 to 14.82   100   1.50   14.82   100   14.82
    17,850   2.60   4.81   14,092   5.28
Peformance share units outstanding
    Years ended November 30,
    2015   2014   2013
Outstanding at beginning of year   2,422,150   1,268,450   805,300
Granted   1,377,250   1,819,700   706,150
Vested   (846,180)   (546,380)   (167,735)
Performance adjustment   228,530   (96,420)   (72,765)
Forfeited     (23,200)   (2,500)
Outstanding at end of year   3,181,750   2,422,150   1,268,450