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Note 6 - Asset Retirement Obligations (Tables)
 9 Months Ended
Sep. 30, 2020
Notes Tables  
Schedule of Change in Asset Retirement Obligation [Table Text Block]
   
Successor
   
Predecessors
 
   
August 22,
2020 through
September 30,
2020
   
January 1,
2020 through
August 21,
2020
 
Beginning asset retirement obligations
   $
2,398
     $
2,212
  
New wells placed on production
    
15
      
97
  
Liabilities settled
    
(29
 )    
-
  
Accretion of discount
    
15
      
89
  
Ending asset retirement obligations
   $
2,399
     $
2,398