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Notes Payable (Schedule of Notes Payable) (Details) (USD $)
Jun. 30, 2013
Dec. 31, 2012
Dec. 31, 2011
Debt Instrument [Line Items]      
Total $ 5,032,471 $ 3,102,006 $ 8,417,461
Less Current Portion (5,032,471) (3,102,006) (2,068,016)
Total Long-term       6,349,445
2012 Convertible Notes [Member]
     
Debt Instrument [Line Items]      
Total 3,421,963 2,428,166   
Unsecured Convertible Note [Member]
     
Debt Instrument [Line Items]      
Total 840,508 673,840 340,504
Amended and Restated Senior 6.25% Convertible Note [Member]
     
Debt Instrument [Line Items]      
Total      6,180,816
Bridge Loan Note Payable [Member]
     
Debt Instrument [Line Items]      
Total      1,196,141
Equipment Purchase and Sale Agreement [Member]
     
Debt Instrument [Line Items]      
Total      700,000
2013 Accounts Receivable Purchase Agreement [Member]
     
Debt Instrument [Line Items]      
Total 750,000     
Interest Promissory Note [Member]
     
Debt Instrument [Line Items]      
Total $ 20,000