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Derivative Financial Instruments (Details 5) (Binomial Lattice Technique [Member], USD $)
 9 Months Ended 12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Level 1 [Member]
      
Significant assumptions utilized in valuation technique      
Linked common shares 1,800,000 1,800,000 1,800,000
Quoted market price on valuation date $ 3.15 $ 3.13 $ 2.74
Contractual exercise rate $ 2.50 $ 2.50 $ 2.50
Term (years) 1 year 11 days 2 years 11 days 1 year 9 months 11 days
Level 1 [Member] | Minimum [Member]
      
Significant assumptions utilized in valuation technique      
Range of market volatilities 38.90% 69.70% 56.80%
Risk free rates using zero coupon US Treasury 0.06% 0.02% 0.02%
Level 1 [Member] | Maximum [Member]
      
Significant assumptions utilized in valuation technique      
Range of market volatilities 68.10% 129.50% 101.60%
Risk free rates using zero coupon US Treasury 0.17% 0.43% 0.25%
Level 2 [Member]
      
Significant assumptions utilized in valuation technique      
Linked common shares 525,000 525,000 525,000
Quoted market price on valuation date $ 3.15 $ 3.13 $ 2.74
Contractual exercise rate $ 2.75 $ 2.75 $ 2.75
Term (years) 1 year 6 months 15 days 2 years 6 months 2 years 3 months 11 days
Level 2 [Member] | Minimum [Member]
      
Significant assumptions utilized in valuation technique      
Range of market volatilities 38.70% 76.60% 56.90%
Risk free rates using zero coupon US Treasury 0.06% 0.02% 0.02%
Level 2 [Member] | Maximum [Member]
      
Significant assumptions utilized in valuation technique      
Range of market volatilities 69.20% 117.60% 94.00%
Risk free rates using zero coupon US Treasury 0.20% 0.43% 0.25%
Level 3 [Member]
      
Significant assumptions utilized in valuation technique      
Linked common shares 1,562,500   1,302,083
Quoted market price on valuation date $ 3.15   $ 2.74
Contractual exercise rate $ 3.60   $ 4.32
Term (years) 4 years 7 months 6 days   5 years 4 months 6 days
Custom lattice variable: Probability of exercisability (434,027 linked common shares)     60.00%
Level 3 [Member] | Minimum [Member]
      
Significant assumptions utilized in valuation technique      
Range of market volatilities 54.20%   67.20%
Risk free rates using zero coupon US Treasury 0.10%   0.02%
Level 3 [Member] | Maximum [Member]
      
Significant assumptions utilized in valuation technique      
Range of market volatilities 71.00%   87.50%
Risk free rates using zero coupon US Treasury 0.47%   0.83%