Annual report pursuant to Section 13 and 15(d)

Acquisitions - (Details Textual)

v3.7.0.1
Acquisitions - (Details Textual)
$ in Thousands, gal in Millions
1 Months Ended 12 Months Ended 211 Months Ended
Mar. 15, 2016
USD ($)
shares
gal
Aug. 19, 2015
USD ($)
shares
gal
Dec. 24, 2014
USD ($)
shares
Jul. 25, 2014
USD ($)
Jun. 06, 2014
USD ($)
Jun. 03, 2014
shares
gal
Jan. 22, 2014
USD ($)
shares
Jan. 31, 2017
Dec. 31, 2016
USD ($)
gal
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Jul. 24, 2014
Business Acquisition [Line Items]                        
Production capacity per year | gal                 502      
Contingent consideration                 $ 28,931 $ 26,949    
Contingent consideration, current portion                 17,637 14,762    
Bargain purchase gain                 0 5,358 $ 0  
Cash                 $ 12,720 $ 41,409 $ 19,369  
Tyson Foods                        
Business Acquisition [Line Items]                        
Contingent consideration         $ 35,000              
Sanimax                        
Business Acquisition [Line Items]                        
Production capacity per year | gal 20               20      
Shares of Common Stock issued (in shares) | shares 500,000                      
Contingent consideration $ 5,000               $ 3,835      
Earnout payment period 7 years                      
Maximum Earnout Payments per year $ 1,700                      
Contingent consideration, current portion                 1,790      
Cash $ 12,541                      
Imperium Renewables, Inc.                        
Business Acquisition [Line Items]                        
Production capacity per year | gal   100                    
Shares of Common Stock issued (in shares) | shares   1,675,000                    
Contingent consideration                 $ 2,093      
Earnout payment period   2 years                    
Bargain purchase gain   $ 5,358                    
Cash   $ 36,748                    
Petrotec AG                        
Business Acquisition [Line Items]                        
Shares of Common Stock issued (in shares) | shares     2,070,538                  
Interest acquired     69.08%           90.58% 87.49%    
Noncontrolling interest percent     30.92%                  
Fair value of noncontrolling interest     $ 8,962                  
Acquisition related costs                 $ 1,289      
Cash tender offers and open market purchases                 149 $ 4,828    
Syntroleum Corporation                        
Business Acquisition [Line Items]                        
Shares of Common Stock issued (in shares) | shares           3,493,613            
Contingent consideration                 27,065      
Contingent consideration, current portion                 9,589      
Risk adjusted discount rate         5.80%              
Syntroleum Corporation | Dynamic Fuels, LLC                        
Business Acquisition [Line Items]                        
Production capacity per year | gal           75            
Interest acquired         50.00% 50.00%            
Dynamic Fuels, LLC                        
Business Acquisition [Line Items]                        
Increase in goodwill         $ 3,202              
Cash         16,447              
Syntroleum Corporation and Dynamic Fuels, LLC | Tyson Foods                        
Business Acquisition [Line Items]                        
Repayments of debt         $ 13,553              
LS9, Inc                        
Business Acquisition [Line Items]                        
Shares of Common Stock issued (in shares) | shares             2,230,559          
Contingent consideration                 13,575 7,590    
Contingent consideration, current portion                 $ 4,165 $ 3,958    
Risk adjusted discount rate                 8.00%      
Earnout Payments             $ 21,500          
Earnout payment period             5 years          
Cash             $ 15,275          
416 S. Bell, LLC                        
Business Acquisition [Line Items]                        
Ownership percentage       50.00%               50.00%
Cash       $ 1,423                
Subsequent Event | Petrotec AG                        
Business Acquisition [Line Items]                        
Interest acquired               100.00%