Note 8 - Loss Per Share - Shares Used in Basic and Diluted Loss Per Common Share Computations (Details) - USD ($)		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Net loss attributable to common shareholders per common share: basic and diluted calculation		$ (3,370,715)	$ (3,888,713)
Weighted average shares used in computation - basic and diluted (in shares)	[1]	65,835,080	36,513,300
Effect of diluted stock options, warrants, and preferred stock (1) (in shares)		0	0
Weighted average common shares outstanding - diluted (in shares)		65,835,080	36,513,300
Loss per common share-basic and diluted (in dollars per share)		$ (0.05)	$ (0.11)

[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: