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Note 11 - Segment Reporting (Details Textual)
3 Months Ended 9 Months Ended
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Number of Operating Segments     3  
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property $ 6,894,109 $ 0 $ 6,894,109 $ 0