Note 2 - Significant Accounting Policies (Tables)

3 Months Ended

Sep. 30, 2019

Notes Tables

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

	September 30, 2019		September 30, 2018
Warrants		17,006,921		16,097,956
Options		7,411,600		7,152,225
Convertible debt		9,289,105		7,743,155
Convertible preferred stock		18,250		17,250

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

	Three months ended September 30, 2019			Three months ended September 30, 2018
Shares issued – beginning of period		28,068,688			25,939,892
Shares held by subsidiaries (Note 8)		(704,309	)		(704,309	)
Shares outstanding – beginning of period		27,364,379			25,235,583
Weighted average shares issued during the period		102,433			424,147
Diluted weighted average shares – end of period		27,466,812			25,659,730