Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity and Capital Stock (Details)

v3.3.0.814
Shareholders' Equity and Capital Stock (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
USD ($)
Sep. 30, 2014
USD ($)
Sep. 30, 2015
USD ($)
item
$ / shares
shares
Sep. 30, 2014
USD ($)
shares
Sep. 30, 2015
CAD / shares
Sep. 30, 2015
USD ($)
shares
Dec. 31, 2014
shares
Dec. 31, 2013
shares
Stockholder's Equity Note [Line Items]                
Grant date intrinsic value | $ / shares     $ 0          
Fair value of options vested in period | $     $ 600          
Share Price | CAD / shares         CAD 0.74      
Number of options outstanding           8,676,918 8,468,614  
Number of options exercisable           7,321,929    
Years of service     5 years          
Stock based compensation | $ $ 200 $ 200 $ 675 $ 720        
Proceeds from Stock Options Exercised | $     $ 410 $ 1,299        
Granted, Options     1,042,354          
Granted, RSU     485,160          
Capital Stock                
Stockholder's Equity Note [Line Items]                
Number of securities called by each unit               1
In Money Stock Option [Member]                
Stockholder's Equity Note [Line Items]                
Number of options outstanding           0    
Options, Unrecognized compensation | $           $ 500    
Compensation recognition period (in years)     1 year 1 month 6 days          
Restricted Stock Units (Rsus) [Member]                
Stockholder's Equity Note [Line Items]                
Retiree age for redemption threshold | item     65          
RSUs, Unrecognized compensation | $           $ 500    
Compensation recognition period (in years)     1 year 4 months 24 days          
Granted, RSU       0        
Restricted Stock Units (Rsus) [Member] | Capital Stock                
Stockholder's Equity Note [Line Items]                
Number of securities called by each unit           1    
Grant Date [Member] | Employee Stock Option [Member]                
Stockholder's Equity Note [Line Items]                
Vesting percentage     10.00%          
Four and One Half Months After Grant [Member] | Employee Stock Option [Member]                
Stockholder's Equity Note [Line Items]                
Vesting percentage     22.00%          
Nine Months After Grant [Member] | Employee Stock Option [Member]                
Stockholder's Equity Note [Line Items]                
Vesting percentage     22.00%          
Thirteen and One Half Months After Grant [Member] | Employee Stock Option [Member]                
Stockholder's Equity Note [Line Items]                
Vesting percentage     22.00%          
Eighteen Months After Date Of Grant [Member] | Employee Stock Option [Member]                
Stockholder's Equity Note [Line Items]                
Vesting percentage     24.00%          
First Anniversary [Member] | Restricted Stock Units (Rsus) [Member]                
Stockholder's Equity Note [Line Items]                
Vesting percentage     50.00%          
Second Anniversary [Member] | Restricted Stock Units (Rsus) [Member]                
Stockholder's Equity Note [Line Items]                
Vesting percentage     50.00%