Shareholders' Equity and Capital Stock (Details 6)
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12 Months Ended | ||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
|
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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]
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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]
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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% |