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Note 10 - Asset Retirement Obligations - Asset Retirement Obligations (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Balance, December 31, 2023     $ 3,794,985  
Additions     0  
Liabilities settled     0  
Accretion expense $ 56,134 $ 53,823 108,805 $ 107,646
Balance, June 30, 2024 $ 3,903,790   $ 3,903,790