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Note 5 - Property and Equipment (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Depreciation, Total $ 2,012,916 $ 1,250,663 $ 3,752,987 $ 2,397,467