Note 7 - Loss Per Share - Shares Used in Basic and Diluted Loss Per Common Share Computations (Details) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Net loss attributable to common shareholders per common shares-basic and diluted		$ (4,059,484)	$ (5,438,017)	$ (17,821,524)	$ (11,900,662)
Weighted average shared used in computation – basic and diluted (in shares)	[1]	78,383,878	65,406,312	71,084,454	51,272,960
Effect of diluted stock options, warrants, and preferred stock (2) (in shares)		0	0	0	0
Weighted average common shares outstanding - diluted (in shares)		78,383,878	65,406,312	71,084,454	51,272,960
Loss per common share basic and diluted (in dollars per share)		$ (0.05)	$ (0.08)	$ (0.25)	$ (0.23)
Loss per common share- diluted (in dollars per share)		$ (0.05)	$ (0.08)	$ (0.25)	$ (0.23)

[1] The following is a summary of the number of underlying shares outstanding at the end of the respective periods that have been excluded from the diluted calculations because the effect on loss per common share would have been anti-dilutive: Six Months ended June 30, 2022 2021 Options 1,035,245 1,013,780 Restricted Stock Units 366,666 325,000 Warrants 36,398,526 31,747,118 Preferred stock: series B 79,246 79,246