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Derivative Financial Instruments (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Preferred Stock [Member]
      
Class of Stock [Line Items]      
Shares issued     66,008
Series A One Preferred Stock [Member]
      
Class of Stock [Line Items]      
Shares issued 862.5 862.5  
Put Option [Member]
      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (loss) on derivatives $ (172,500)    
Call Option [Member]
      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (loss) on derivatives 108,361    
Forward Contracts [Member]
      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (loss) on derivatives (297,451)    
Contingent Dividend Payment [Member]
      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (loss) on derivatives 800,109 3,864,164 (2,869,504)
Issuance of convertible preferred stock $ 6,009 $ 15,954 $ 2,003,688