XML 34 R89.htm IDEA: XBRL DOCUMENT v2.4.0.8
Stock-based compensation - Options by exercise price range (Details) (Share option plan, CAD)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Number of options outstanding 2,213,280  
Options outstanding, weighted average remaining life 6 years 11 months 7 years 3 months
Options outstanding, weighted average exercise price 5.51  
Number of options exercisable 892,700 1,106,274
Options exercisable, weighted average remaining life 4 years 6 months  
Options exercisable, weighted average exercise price 8.00 8.59
$2.75
    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price (CAD per share) 2.75  
Number of options outstanding 414,440  
Options outstanding, weighted average remaining life 8 years 6 months  
Options outstanding, weighted average exercise price 2.75  
Number of options exercisable 46,440  
Options exercisable, weighted average remaining life 8 years 3 months 18 days  
Options exercisable, weighted average exercise price 2.75  
$2.79
    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price (CAD per share) 2.79  
Number of options outstanding 680,000  
Options outstanding, weighted average remaining life 8 years 6 months 12 days  
Options outstanding, weighted average exercise price 2.79  
Number of options exercisable 80,000  
Options exercisable, weighted average remaining life 8 years 6 months  
Options exercisable, weighted average exercise price 2.79  
$3.69
    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price (CAD per share) 3.69  
Number of options outstanding 68,100  
Options outstanding, weighted average remaining life 4 years 2 months 24 days  
Options outstanding, weighted average exercise price 3.69  
Number of options exercisable 68,100  
Options exercisable, weighted average remaining life 4 years 2 months  
Options exercisable, weighted average exercise price 3.69  
$4.90
    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price (CAD per share) 4.90  
Number of options outstanding 40,000  
Options outstanding, weighted average remaining life 8 years 3 months  
Options outstanding, weighted average exercise price 4.90  
Number of options exercisable 8,000  
Options exercisable, weighted average remaining life 8 years 3 months  
Options exercisable, weighted average exercise price 4.90  
$5.00
    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price (CAD per share) 5.00  
Number of options outstanding 221,760  
Options outstanding, weighted average remaining life 1 year 7 months 18 days  
Options outstanding, weighted average exercise price 5.00  
Number of options exercisable 221,760  
Options exercisable, weighted average remaining life 1 year 7 months  
Options exercisable, weighted average exercise price 5.00  
$5.91
    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price (CAD per share) 5.91  
Number of options outstanding 177,400  
Options outstanding, weighted average remaining life 10 years  
Options outstanding, weighted average exercise price 5.91  
Number of options exercisable 0  
Options exercisable, weighted average exercise price 0.00  
$6.56
    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price (CAD per share) 6.56  
Number of options outstanding 118,860  
Options outstanding, weighted average remaining life 7 years  
Options outstanding, weighted average exercise price 6.56  
Number of options exercisable 56,520  
Options exercisable, weighted average remaining life 6 years  
Options exercisable, weighted average exercise price 6.56  
$8.28
    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price (CAD per share) 8.28  
Number of options outstanding 60,000  
Options outstanding, weighted average remaining life 5 years 6 months  
Options outstanding, weighted average exercise price 8.28  
Number of options exercisable 48,000  
Options exercisable, weighted average remaining life 5 years 6 months  
Options exercisable, weighted average exercise price 8.28  
$8.58
    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price (CAD per share) 8.58  
Number of options outstanding 30,000  
Options outstanding, weighted average remaining life 6 years 8 months  
Options outstanding, weighted average exercise price 8.58  
Number of options exercisable 18,000  
Options exercisable, weighted average remaining life 6 years 8 months  
Options exercisable, weighted average exercise price 8.58  
$9.33
    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price (CAD per share) 9.33  
Number of options outstanding 84,460  
Options outstanding, weighted average remaining life 5 years 4 months  
Options outstanding, weighted average exercise price 9.33  
Number of options exercisable 54,540  
Options exercisable, weighted average remaining life 5 years 6 months  
Options exercisable, weighted average exercise price 9.33  
$10.21
    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price (CAD per share) 10.13  
Number of options outstanding 82,780  
Options outstanding, weighted average remaining life 6 years 2 months 24 days  
Options outstanding, weighted average exercise price 10.13  
Number of options exercisable 55,860  
Options exercisable, weighted average remaining life 5 years 9 months  
Options exercisable, weighted average exercise price 10.13  
$13.21
    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price (CAD per share) 13.21  
Number of options outstanding 75,000  
Options outstanding, weighted average remaining life 4 years  
Options outstanding, weighted average exercise price 13.21  
Number of options exercisable 75,000  
Options exercisable, weighted average remaining life 4 years  
Options exercisable, weighted average exercise price 13.21  
$13.50
    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price (CAD per share) 13.50  
Number of options outstanding 82,720  
Options outstanding, weighted average remaining life 3 years 8 months  
Options outstanding, weighted average exercise price 13.50  
Number of options exercisable 82,720  
Options exercisable, weighted average remaining life 3 years 8 months  
Options exercisable, weighted average exercise price 13.50  
$16.46
    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price (CAD per share) 16.46  
Number of options outstanding 50,000  
Options outstanding, weighted average remaining life 4 years 3 months  
Options outstanding, weighted average exercise price 16.46  
Number of options exercisable 50,000  
Options exercisable, weighted average remaining life 4 years 3 months  
Options exercisable, weighted average exercise price 16.46  
$16.75
    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Exercise price (CAD per share) 16.75  
Number of options outstanding 27,760  
Options outstanding, weighted average remaining life 2 years 8 months  
Options outstanding, weighted average exercise price 16.75  
Number of options exercisable 27,760  
Options exercisable, weighted average remaining life 2 years 8 months  
Options exercisable, weighted average exercise price 16.75