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Components of Inventory Balances (Detail) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Inventory [Line Items]    
Spare parts $ 1,309 $ 1,415
Total inventories 3,203 3,487
Corn    
Inventory [Line Items]    
Raw materials 188 517
Enzymes And Other Inputs    
Inventory [Line Items]    
Raw materials 314 283
Nutrients    
Inventory [Line Items]    
Raw materials 12 5
Ethanol    
Inventory [Line Items]    
Finished goods 68 172
Isobutanol    
Inventory [Line Items]    
Finished goods 264 239
Jet Fuels Isooctane And Isooctene    
Inventory [Line Items]    
Finished goods 551 514
Distiller's grains    
Inventory [Line Items]    
Finished goods 12 13
Agri-Energy    
Inventory [Line Items]    
Work in process 328 220
Gevo    
Inventory [Line Items]    
Work in process $ 157 $ 109