Note 2 - Significant Accounting Policies (Tables)

9 Months Ended

Mar. 31, 2020

Notes Tables

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

	March 31, 2020		March 31, 2019
Warrants		19,393,013		16,591,570
Options		7,716,600		7,106,600
Convertible debt		10,046,039		8,449,932
Convertible preferred stock		18,750		17,750

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

	Three months ended March 31, 2020			Three months ended March 31, 2019			Nine months ended March 31, 2020			Nine months ended March 31, 2019
Shares issued – beginning of period		30,195,005			27,121,371			28,068,688			25,939,892
Shares held by subsidiaries (Note 8)		(704,309	)		(704,309	)		(704,309	)		(704,309	)
Shares outstanding – beginning of period		29,490,696			26,417,062			27,364,379			25,235,583
Weighted average shares issued during the period		150,242			425,714			1,269,223			1,055,514
Diluted weighted average shares – end of period		29,640,938			26,842,776			28,633,602			26,291,097