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Note 2 - Basis of Presentation and Summary of Significant Accounting Policies (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Property, Plant and Equipment [Table Text Block]
  

March 31, 2022

  

December 31, 2021

 

Land

 $1,122  $1,122 

Transportation equipment

  257   202 

Leasehold improvements

  167   143 

Information technology

  83   125 

Field equipment

  8   8 

Total other property and equipment, net

 $1,637  $1,600