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Debt (Details) - USD ($) | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Total debt | $ 188,767,000 | $ 229,619,000
Less current portion of debt | 22,778,000 | 59,515,000
Total long term debt | 165,989,000 | 170,104,000
Senior Debt-TEC | Promissory Notes [Member] |  |
Total debt | 7,095,000 | 7,066,000
Senior Debt-TEC | Acquisition Participation Term Notes |  |
Total debt | 26,500 |
Senior Debt-TEC | Revolving Credit Facility |  |
Total debt | 75,980,000 | 80,310,000
Senior Debt | Revenue Participation Term Notes |  |
Total debt | 11,915,000 | 11,864,000
Senior Debt | Promissory Notes [Member] |  |
Total debt | 0 | 1,444,000
Senior Debt | Acquisition Participation Term Notes |  |
Total debt | 26,461,000 | 26,384,000
Cilion [Member] | Subordinated Debt [Member] |  |
Total debt | 6,619,000 | 6,274,000
Subordinated Notes |  |
Total debt | 14,304,000 | 12,745,000
EB-5 Promissory Notes |  |
Total debt | 40,692,000 | 43,120,000
GAFI Term and Revolving Loans |  |
Total debt | 0 | 33,626,000
Term Loan on Equipment Purchase |  |
Total debt | 5,701,000 | 5,652,000
PPP Loans |  |
Total debt | $ 0 | $ 1,134,000

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