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Note 13 - Segments (Tables)
 3 Months Ended
Mar. 31, 2018
Notes Tables  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
   
Three Months Ended March 31,
  
   
2018
    
2017
  
Revenues:
                
Gevo
   $
25
     $
90
  
Gevo Development / Agri-Energy
    
8,218
      
5,526
  
Consolidated
   $
8,243
     $
5,616
  
                 
Loss from operations:
                
Gevo
   $
(2,476
)
   $
(3,065
)
Gevo Development / Agri-Energy
    
(2,523
)
    
(4,117
)
Consolidated
   $
(4,999
)
   $
(7,182
)
                 
Interest expense:
                
Gevo
   $
825
     $
714
  
Gevo Development / Agri-Energy
    
–
      
–
  
Consolidated
   $
825
     $
714
  
                 
Depreciation expense:
                
Gevo
   $
84
     $
137
  
Gevo Development / Agri-Energy
    
1,562
      
1,539
  
Consolidated
   $
1,646
     $
1,676
  
                 
Acquisitions of plant, property and equipment:
                
Gevo
   $
–
     $
56
  
Gevo Development / Agri-Energy
    
67
      
617
  
Consolidated
   $
67
     $
673
  
   
March 31,
    
December
31,
  
   
2018
    
2017
  
Total assets:
                
Gevo
   $
81,629
     $
87,507
  
Gevo Development / Agri-Energy
    
147,290
      
149,758
  
Intercompany eliminations
    
(146,046
 )    
(148,412
)
Consolidated
   $
82,873
     $
88,853