Note 3 - Basic and Diluted Net Income Per Share - Basic and Diluted Earnings Per Share (Details) - USD ($)	3 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Net income available to common shareholders	$ 485,011	$ (1,830,770)
Net income available to common shareholders (in shares)	39,383,459	37,445,919
Basic and diluted (in dollars per share)	$ 0.01	$ (0.05)
Net income available to preferred shareholders	$ 12,157	$ (50,223)
Net income available to preferred shareholders (in shares)	987,200	1,027,240
Net income available to preferred shareholders (in dollars per share)	$ 0.01	$ (0.05)
Basic net income per share	$ 497,168
Basic net income per share (in shares)	40,370,659	38,473,159
Basic net income per share (in dollars per share)	$ 0.01	$ (0.05)
Basic and diluted net loss per share	$ 497,168	$ (1,880,993)