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Debt (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Total debt	$ 184,978,000	$ 229,619,000
Less current portion of debt	23,863,000	59,515,000
Total long term debt	161,115,000	170,104,000
Senior Debt | Promissory Notes [Member]
Total debt	0	1,444,000
Senior Debt | Acquisition Participation Term Notes
Total debt	26,457,000	26,384,000
Senior Debt | Revenue Participation Term Notes
Total debt	11,914,000	11,864,000
Subordinated Notes
Total debt	13,229,000	12,745,000
Senior Debt-TEC | Promissory Notes [Member]
Total debt	7,093,000	7,066,000
Senior Debt-TEC | Revolving Credit Facility
Total debt	71,732,000	80,310,000
Cilion [Member] | Subordinated Debt [Member]
Total debt	6,386,000	6,274,000
Term Loan on Equipment Purchase
Total debt	5,705,000	5,652,000
EB-5 Promissory Notes
Total debt	42,462,000	43,120,000
PPP Loans
Total debt	0	1,134,000
GAFI Term and Revolving Loans
Total debt	$ 0	$ 33,626,000

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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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- Definition

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