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Note 11 - Asset Retirement Obligations (Tables) | 12 Months Ended
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Dec. 31, 2021
Notes Tables |
Schedule of Change in Asset Retirement Obligation [Table Text Block] |
Balance, January 1, 2020 |  |  | 2,044,705 |
Additions |  |  | 96,864 |
Accretion expense |  |  | 140,704 |
Liabilities settled |  |  | - |
Balance, December 31, 2020 |  | $ | 2,282,273 |
Additions |  |  | 1,057,327 |
Accretion expense |  |  | 134,360 |
Liabilities settled |  |  | (311,235 | )
Balance, December 31, 2021 |  | $ | 3,162,725 |

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