Note 9 - Loss Per Share - Shares Used in Basic and Diluted Loss Per Common Share Computations (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net loss attributable to common stockholders: basic and diluted calculation	$ (3,163,450)	$ (4,059,485)	$ (10,508,620)	$ (17,821,524)
Weighted average shared used in computation – basic and diluted (in shares)	4,031,356	3,919,203	3,998,887	3,602,515
Effect of diluted stock options, warrants, and preferred stock (1) (in shares)	0	0	0	0
Weighted average common shares outstanding - diluted (in shares)	4,031,356	3,919,203	3,998,887	3,602,515
Net loss attributable to common shareholders per common shares-basic and diluted (in dollars per share)	$ (0.78)	$ (1.04)	$ (2.63)	$ (4.95)