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4. Debt (Tables)
 9 Months Ended
Sep. 30, 2018
Disclosure 4.Notes Payable Tables Abstract  
Schedule of Notes Payable
   

September 30,

2018

    

December 31,

2017

  
Third Eye Capital term notes   $ 7,022     $ 6,931  
Third Eye Capital revolving credit facility     43,807       35,371  
Third Eye Capital revenue participation term notes     11,792       11,636  
Third Eye Capital acquisition term notes     23,661       20,048  
Third Eye Capital promissory note     2,080       -  
Cilion shareholder seller notes payable     5,936       5,824  
Subordinated notes     9,640       8,725  
EB-5 long term promissory notes     36,847       36,039  
Unsecured working capital loans     5,835       4,861  
GAFI Term and Revolving loans     25,018       24,351  
Total debt     171,638       153,786  
Less current portion of debt     19,402       15,625  
Total long term debt   $ 152,236     $ 138,161  
Maturities of Long-term Debt
Twelve months ended September 30,   Debt Repayments  
2019   $ 19,402  
2020     140,108  
2021     12,500  
2022     2,686  
Total debt     174,696  
Debt issuance costs     (3,058 )
Total debt   $ 171,638