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Note 6 - Derivative Instruments and Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2012
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Table Text Block]
  Quarter Ended    
Year to Date Ended
 
 
 
Classified
 
September 30,
2012
   
September 30,
2011
   
September 30,
2012
   
September 30,
2011
 
Commodity derivatives
Cost of sales
  $ 2,670     $ (1,016 )   $  2,204     $  1,680  
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   
Amount of Gains (Losses) Recognized in OCI on Derivatives
 
   
Quarter Ended
   
Year to Date Ended
 
Derivatives
in Cash Flow Hedging
Relationship
 
September 30,
2012
   
September 30,
2011
   
September 30,
2012
   
September 30,
2011
 
Commodity derivatives
    -     $ (3,613 )   $ (286 )   $ (3,613 )
   
Amount of Gains (Losses) Reclassified from AOCI into Earnings
 
   
Quarter Ended
   
Year to Date Ended
 
Location of Losses Reclassified from AOCI into Income
 
 
September 30,
2012
   
September 30,
2011
   
September 30,
2012
   
September 30,
2011
 
Cost of sales
    -     $ 120     $ (413 )   $ 120  
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]
             
Fair Value Measurements
 
   
Classified
 
Total
   
Level 1
   
Level 2
   
Level 3
 
September 30, 2012
                           
Assets
                           
Ethanol Derivatives
 
Derivative Assets
  $ 606     $ 606     $ -     $ -  
                                     
Liabilities
                                   
Corn Derivatives
 
Derivative Liabilities
  $ (135 )   $ (135 )   $ -     $ -  
Ethanol Derivatives
 
Derivative Liabilities
  $ (13 )   $ (13 )   $ -     $ -  
                                     
December 31, 2011
                                   
Assets
                                   
Corn Derivatives
 
Derivative Assets
  $  1,091     $  1,091     $ -     $ -  
Ethanol Derivatives
 
Derivative Assets
  $ 213     $ 213     $ -     $ -  
                                     
                                     
Liabilities
                                   
Corn Derivatives
 
Derivative Liabilities
  $ (974 )   $ ( 974 )   $ -     $ -  
Ethanol Derivatives
 
Derivative Liabilities
  $ (2,491 )   $ (2,491 )   $ -     $ -