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5. Notes Payable (Details Narrative) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Mar. 31, 2013
Mar. 31, 2014
Third Eye Capital Notes
Mar. 31, 2014
Revolving Credit Facility
Mar. 31, 2014
Revenue Participation Term Notes
Mar. 31, 2014
Acquisition Term Notes
Mar. 31, 2014
Cilion shareholder Seller note payable
Mar. 31, 2014
State Bank of India loan
Dec. 31, 2013
State Bank of India loan
Mar. 31, 2014
Subordinated Notes
Dec. 31, 2013
Subordinated Notes
Mar. 31, 2014
EB-5 long-term promissory notes
Outstanding amount of loan $ 75,900     $ 7,300 $ 31,600 $ 9,900 $ 17,600 $ 5,100 $ 3,100 $ 3,200 $ 5,000 $ 5,300  
Unamortized fair value discounts       200   500 400 200     200 300  
Debt issuance costs         900                
Accrued interest                 3,000 2,700     21
Principal payments to Secunderabad 1,500   1,100                    
Interest costs 51   100                    
Outstanding amount of Secunderabad 1,000 1,900                      
Other long term liabilities 300                         
Other current liabilities 90                        
Short term debt $ 47