Note 2 - Significant Accounting Policies (Tables)

9 Months Ended

Mar. 31, 2021

Notes Tables

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

	March 31, 2021		March 31, 2020
Warrants		24,653,567		19,393,013
Options		10,471,600		7,716,600
Convertible debt		10,368,364		10,046,039
Convertible preferred stock		19,750		18,750

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Three months ended March 31, 2021			Three months ended March 31, 2020			Nine months ended March 31, 2021			Nine months ended March 31, 2020
Shares issued – beginning of period		32,270,594			30,195,005			31,409,005			28,068,688
Shares held by subsidiaries (Note 7)		(704,309	)		(704,309	)		(704,309	)		(704,309	)
Shares outstanding – beginning of period		31,566,285			29,490,696			30,704,696			27,364,379
Weighted average shares issued during the period		1,353,526			150,242			919,613			1,269,223
Diluted weighted average shares – end of period		32,919,811			29,640,938			31,624,309			28,633,602