Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity and Capital Stock - Assumptions (Details)

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Shareholders' Equity and Capital Stock - Assumptions (Details)
9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Expected option life (years)   3 years 5 months 27 days
Expected volatility   66.00%
Risk-free interest rate   1.40%
Expected dividend rate 0.00%  
Forfeiture rate (options)   4.50%
Maximum [Member]    
Forfeiture rate (RSUs) 8.30%  
Expected option life (years) 3 years 7 months 17 days  
Expected volatility, Maximum 57.00%  
Risk-free interest rate, Maximum 0.70%  
Forfeiture rate (options) 5.00%  
Minimum [Member]    
Forfeiture rate (RSUs) 7.80%  
Expected option life (years) 3 years 7 months 6 days  
Expected volatility, Minimum 56.00%  
Risk-free interest rate, Minimum 0.50%  
Forfeiture rate (options) 4.90%