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Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2023
Mar. 31, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Retained Earnings (Accumulated Deficit) $ (297,864,575)       $ (297,864,575)   $ (282,329,611)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest (8,652,272) $ (6,918,320) $ (5,504,589) $ (5,681,742) (15,570,592) $ (11,186,331)  
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect         (3,671,273) $ (936,059)  
Cash and Cash Equivalents, at Carrying Value $ 114,304       $ 114,304   $ 3,785,577