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Note 11 - Asset Retirement Obligations (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Schedule of Change in Asset Retirement Obligation [Table Text Block]

Balance, January 1, 2021

 $2,282,273 

Additions

  1,057,327 

Accretion expense

  134,360 

Liabilities settled

  (311,235)

Balance, December 31, 2021

 $3,162,725 

Additions

  200,496 

Accretion expense

  206,359 

Liabilities settled

  - 

Balance, December 31, 2022

 $3,569,580