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4. Debt (Details Narrative) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Third Eye Capital Term Notes
Principal and interest outstanding	$ 6,800
Unamortized discount	200
Third Eye Capital Revolving Credit Facility
Principal and interest outstanding	32,800
Unamortized debt issuance costs	800
Third Eye Capital Revenue Participation Term Note
Principal and interest outstanding	11,500
Unamortized discount	300
Third Eye Capital Acquisition Term Notes
Principal and interest outstanding	19,800
Unamortized discount	500
Cilion shareholder Seller notes payable
Principal and interest outstanding	5,800
Subordinated Notes
Principal and interest outstanding	8,400		$ 7,600
Unamortized debt issuance costs	300
EB-5 long-term promissory notes
Principal and interest outstanding	34,500
Outstanding accrued interest	1,300
Unsecured working capital loans
Principal and interest outstanding	0		$ 15,000
Principal and interest payments made	2,300	$ 4,500
Unsecured working capital loans - Gemini
Principal and interest outstanding	3,600
Principal and interest payments made	$ 6,200

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399

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-Section 55
-Paragraph 8
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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-Name Accounting Standards Codification
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