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Note 3 - Derivative Instruments (Tables)
6 Months Ended
Jun. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Derivative Instruments [Table Text Block]
   

Asset/(Liability)

 
   

June 30, 2014

   

December 31, 2013

 
   

Quantity

(Contracts) Long/

(Short)

   

Fair Value

   

Quantity

(Contracts) Long/

(Short)

   

Fair Value

 

Regulated options, included in other current assets

    (325

)

  $ (2,378

)

    (50

)

  $ (328

)

Regulated fixed price future commitments, included in other current assets

    (41

)

  $ 83       4     $ -