Note 6 - Loss Per Share - Shares Used in Basic and Diluted Loss Per Common Share Computations (Details) - USD ($)		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021
Net loss attributable to common shareholders per common share: basic and diluted calculation		$ (25,737,634)	$ (19,657,174)
Weighted average shares used in computation - basic and diluted (in shares)	[1]	72,997,987	54,876,044
Effect of diluted stock options, warrants and preferred stock (1) (in shares)		0	0
Weighted average common shares outstanding-diluted (in shares)		72,997,987	54,876,044
Loss per common share - basic and diluted (in dollars per share)		$ (0.35)	$ (0.36)

[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: Year Ended December 31, 2022 2021 Options 981,060 1,062,871 RSUs 83,334 366,667 Warrants 36,328,731 31,699,885 Preferred stock: Series B 79,246 79,246