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4. Debt (Tables)
 9 Months Ended
Sep. 30, 2016
Wet distiller's grains sales  
Schedule of Notes Payable
    September 30, 2016     December 31, 2015  
Third Eye Capital term notes   $ 6,459     $ 6,269  
Third Eye Capital revolving credit facility     32,525       25,870  
Third Eye Capital revenue participation term notes     10,846       10,526  
Third Eye Capital acquisition term notes     18,768       18,260  
Cilion shareholder seller notes payable     5,636       5,523  
State Bank of India secured term loan     3,161       4,200  
Subordinated notes     7,114       6,340  
EB-5 long term promissory notes     25,830       23,907  
Unsecured working capital loans     441       -  
Total debt     110,780       100,895  
Less current portion of debt     12,546       11,947  
Total long term debt   $ 98,234     $ 88,948  
Maturities of Long-term Debt
Twelve months ended September 30,   Debt Repayments  
2017   $ 12,546  
2018     73,335  
2019     20,500  
2020     6,636  
2021     -  
Total debt     113,017  
Discounts     (2,237 )
Total debt, net of discounts   $ 110,780