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5. Notes Payable (Details) (USD $)
Jun. 30, 2013
Dec. 31, 2012
Notes Payable Details    
Third Eye Capital term note $ 7,600,638 $ 6,679,466
Third Eye Capital revolving credit facility 33,033,679 23,378,535
Third Eye Capital revenue participation term note 8,916,603 7,406,224
Third Eye Capital acquisition term note 17,118,630 14,768,846
Cilion shareholder Seller note payable 4,439,720 4,011,430
State Bank of India secured term loan 5,683,159 5,756,752
Revolving line of credit - related party    1,540,074
Subordinated debt notes 4,749,494 3,338,114
EB-5 long term promissory notes 1,021,740 1,006,863
Unsecured working capital loans and short-term notes 1,125,853 2,159,291
Total debt 83,689,516 70,045,595
Less current portion 11,962,099 34,523,591
Total long term debt $ 71,727,417 $ 35,522,004