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4. Debt (Details Narrative) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
January 2018 Note
Principal and interest outstanding			$ 162
February 2018 Note
Principal and interest outstanding			$ 2,100
February 2019 Note
Principal and interest outstanding	$ 2,200
Third Eye Capital Term Notes
Principal and interest outstanding	7,000
Third Eye Capital Revolving Credit Facility
Principal and interest outstanding	50,800
Third Eye Capital Revenue Participation Term Note
Principal and interest outstanding	11,800
Third Eye Capital Acquisition Term Notes
Principal and interest outstanding	24,100
Third Eye Capital Reserve Liquidity Notes
Principal and interest outstanding	0
Cilion Shareholder Seller Notes Payable
Principal and interest outstanding	6,000
Subordinated Notes
Principal and interest outstanding	10,400	$ 10,100
EB-5 Phase I Notes
Principal outstanding	35,000
Interest outstanding	2,300
EB-5 Phase II Notes
Principal and interest outstanding	1,500
Unsecured Working Capital Loans
Principal and interest outstanding	3,600	4,600
Secunderabad Oils
Principal and interest outstanding	$ 800	$ 300

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