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5. Notes Payable (Details Narrative) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Interest payments     $ 356 $ 6,751  
Third Eye Capital Term Notes          
Principal and interest outstanding $ 6,200   6,200    
Unamortized discount 200   200    
Third Eye Capital Revolving Credit Facility          
Principal and interest outstanding 25,100   25,100    
Unamortized discount 700   700    
Third Eye Capital Revenue Participation Term Notes          
Principal and interest outstanding 10,400   10,400    
Unamortized discount 700   700    
Third Eye Capital Acquisition Term Notes          
Principal and interest outstanding 18,000   18,000    
Unamortized discount 500   500    
Cilion shareholder Seller note payable          
Principal and interest outstanding 5,500   5,500    
State Bank of India secured term loan          
Principal and interest outstanding 1,500   1,500   $ 2,600
Default interest payable 3,800   3,800   3,400
Subordinated Notes          
Principal and interest outstanding 5,800   5,800   5,400
Unamortized discount 400   400   200
EB-5 long-term promissory notes          
Principal and interest outstanding 36,000   36,000    
Unsecured working capital loans          
Principal and interest outstanding 1,400   1,400   $ 1,300
Principal payments made 2,300 $ 1,800 3,300 4,200  
Interest payments $ 73 $ 48 $ 177 $ 127