Note 3 - Basic and Diluted Net Income Per Share - Basic and Diluted Earnings Per Share (Details) - USD ($)	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Net income available to common shareholders, basic	$ 1,773,401	$ 261,849
Net income available to common shareholders (in shares)	37,390,524	32,588,418
Basic income per share (in dollars per share)	$ 0.05	$ 0.01
Effect of dilutive securities, shares (in shares)	1,060,640	5,709,741
Diluted income per share	$ 1,773,401	$ 261,849
Diluted income per share (in shares)	38,451,164	38,298,159
Diluted income per share (in dollars per share)	$ 0.05	$ 0.01
Net income (loss) available to common shareholders, basic	$ 1,773,401	$ 261,849
Shares, basic (in shares)	37,390,524	32,588,418
Effect of dilutive securities, per share (in dollars per share)