Annual report pursuant to Section 13 and 15(d)

Shareholders' Equity and Capital Stock (Details 6)

v2.4.0.8
Shareholders' Equity and Capital Stock (Details 6)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Expected warrant life (years)   1 year 6 months 0 years
Expected volatility, Minimum 61.00% 63.00% 79.00%
Expected volatility, Maximum 66.00% 78.00% 82.00%
Risk-free interest rate, Minimum 0.90% 1.00% 1.30%
Risk-free interest rate, Maximum 1.40% 1.30% 1.90%
Forfeiture rate (warrants) 0.00% 0.00% 0.00%
Forfeiture rate (RSUs) 7.70%   5.00%
Expected dividend rate 0.00% 0.00% 0.00%
Maximum [Member]
     
Expected warrant life (years) 3 years    
Expected option life (years) 3 years 6 months 4 days 3 years 4 months 13 days 3 years 3 months 11 days
Forfeiture rate (options) 4.40% 4.80% 5.10%
Forfeiture rate (RSUs)   22.30%  
Minimum [Member]
     
Expected warrant life (years) 1 month 28 days    
Expected option life (years) 3 years 4 months 28 days 3 years 3 months 14 days 3 years 2 months 26 days
Forfeiture rate (options) 4.20% 4.60% 4.40%
Forfeiture rate (RSUs)   12.50%