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4. Debt (Tables)
 12 Months Ended
Dec. 31, 2020
Debt Disclosure [Abstract]  
Schedule of long-term debt
    December 31, 2020     December 31, 2019  
Third Eye Capital term notes   $ 7,066     $ 7,024  
Third Eye Capital revolving credit facility     80,310       62,869  
Third Eye Capital revenue participation term notes     11,864       11,794  
Third Eye Capital acquisition term notes     26,384       25,518  
Third Eye Capital promissory note     1,444       2,815  
Cilion shareholder seller notes payable     6,274       6,124  
Subordinated notes     12,745       11,502  
Term loan on Equipment purchase     5,652       -  
EB-5 promissory notes     43,120       41,932  
PPP loans     1,134       -  
Unsecured working capital loans     -       2,631  
GAFI Term and Revolving loans     33,626       30,216  
Total debt     229,619       202,425  
Less current portion of debt     59,515       22,740  
Total long term debt   $ 170,104     $ 179,685  
                 
Maturities of long-term debt
Twelve months ended December 31,   Debt Repayments  
2021   $ 59,515  
2022     148,918  
2023     13,936  
2024     5,209  
2025     936  
There after     1,559  
Total debt     230,073  
Debt issuance costs     (454 )
Total debt, net of debt issuance costs   $ 229,619