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5. Notes Payable (Tables)
 12 Months Ended
Dec. 31, 2015
Wet distiller's grains sales  
Schedule of Notes Payable
    December 31, 2015     December 31, 2014  
Third Eye Capital term note   $ 6,269     $ 7,394  
Third Eye Capital revolving credit facility     25,870       22,330  
Third Eye Capital revenue participation term note     10,526       10,195  
Third Eye Capital acquisition term note     18,260       17,728  
Cilion shareholder seller note payable     5,523       5,373  
State Bank of India secured term loan     4,200       6,032  
Subordinated notes     6,340       5,428  
EB-5 long term promissory notes     23,907       1,534  
Unsecured working capital loans     -       1,287  
Total debt     100,895       77,301  
Less current portion of debt     11,947       12,746  
Total long term debt   $ 88,948     $ 64,555  
Maturities of Long-term Debt
Year ended December 31,   Debt Repayments  
2016   $ 11,947  
2017     63,833  
2018     3,500  
2019     22,523  
2020     -  
Total debt     101,803  
Discounts     (908 )
Total debt, net of discounts   $ 100,895