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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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Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

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