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Note 6 - Asset Retirement Obligation (Tables)
 12 Months Ended
Dec. 31, 2012
Schedule of Asset Retirement Obligations [Table Text Block]
Asset Category
 
Asset Retirement
Obligation Liability
 
Estimated Life
(years)
 
             
Oil and gas producing properties
  $ 4   (1)    15  
(1)
This is a recurring Level III fair value measurement.
Schedule of Change in Asset Retirement Obligation [Table Text Block]
Asset retirement obligation at beginning of  year
  $ -  
         
Additions during the year
    4  
         
Disposals during the year
    -  
         
Revisions of estimates
    -  
         
Accretion expense
    -  
         
Asset retirement obligation at end of year
  $ 4