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4. Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Total revenues
Third Eye Capital term note	$ 6,931	$ 6,577
Third Eye Capital revolving credit facility	35,371	24,927
Third Eye Capital revenue participation term note	11,636	11,042
Third Eye Capital acquisition term note	20,048	19,085
Cilion shareholder Seller note payable	5,824	5,674
Subordinated notes	8,725	7,565
EB-5 long term promissory notes	36,039	35,027
Unsecured working capital loans	4,861	1,817
GAFI Term and Revolving loans	24,351	0
Total debt	153,786	111,714
Less current portion of debt	15,625	11,409
Total long term debt	$ 138,161	$ 100,305

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