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Note 2 - Basis of Presentation and Summary of Significant Accounting Policies (Tables)
 9 Months Ended
Sep. 30, 2020
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
Successor
    
Predecessors
  
   
September 30,
2020
    
December 31,
2019
  
   
(in thousands)
  
Information technology
   $
333
     $
459
  
Transportation equipment
    
44
      
-
  
Leasehold improvements
    
27
      
37
  
Field equipment
    
11
      
12
  
Total other property and equipment, net
   $
415
     $
508