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Note 5 - Property and Equipment (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Depreciation, Total $ 2,412,597 $ 1,668,984 $ 6,165,584 $ 4,066,451