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4. Debt (Details Narrative) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Third Eye Capital Term Notes
Principal and interest outstanding	$ 6,700
Unamortized discount	300
Third Eye Capital Revolving Credit Facility
Principal and interest outstanding	30,300
Unamortized debt issuance costs	1,100
Third Eye Capital Revenue Participation Term Note
Principal and interest outstanding	11,300
Unamortized discount	500
Third Eye Capital Acquisition Term Notes
Principal and interest outstanding	19,500
Unamortized discount	800
Cilion shareholder Seller notes payable
Principal and interest outstanding	5,700
Subordinated Notes
Principal and interest outstanding	8,200		$ 7,600
EB-5 long-term promissory notes
Principal and interest outstanding	36,000
Outstanding accrued interest	1,500
Unsecured working capital loans
Principal and interest outstanding	0
Principal and interest payments made	2,300	$ 1,000
Unsecured working capital loans - Gemini
Principal and interest outstanding	3,700
Principal and interest payments made	$ 2,800

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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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-Name Accounting Standards Codification
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-Section 55
-Paragraph 8
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
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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
-Topic 210
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