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Note 10 - Asset Retirement Obligations - Asset Retirement Obligations (Details) - USD ($)
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Balance, December 31, 2022 $ 3,569,580  
Additions 0  
Liabilities settled 0  
Accretion expense 53,823 $ 49,932
Balance, March 31, 2023 $ 3,623,403