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Note 2 - Basis of Presentation and Summary of Significant Accounting Policies (Tables)
9 Months Ended
Sep. 30, 2021
Notes Tables  
Property, Plant and Equipment [Table Text Block]
  

September 30,

2021

  

December 31,

2020

 

Land

 $1,122  $725 

Information technology

  167   292 

Transportation equipment

  86   41 

Leasehold improvements

  13   24 

Field equipment

  9   10 

Total other property and equipment, net

 $1,397  $1,092