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Note 6 - Accrued Liabilities (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Schedule of Accrued Liabilities [Table Text Block]
  

December 31,

 
  

2022

  

2021

 
         

Payroll, bonus, and benefits

 $88  $41 

Legal and consulting

  403   371 

Well development

  709   113 

Water project

  85   - 

Other accrued expenses

  260   283 
  $1,545  $808