Note 2 - Significant Accounting Policies (Tables)

9 Months Ended

Mar. 31, 2019

Notes Tables

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

	March 31, 2019		March 31, 2018
Warrants		16,591,570		12,176,269
Options		7,106,600		6,827,225
Convertible debt		8,449,932		7,337,805
Convertible preferred stock		17,750		16,750

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

	Three months ended March 31, 2019			Three months ended March 31, 2018			Nine months ended March 31, 2019			Nine months ended March 31, 2018
Shares issued – beginning of period		27,121,371			25,011,939			25,939,892			24,748,213
Shares held by subsidiaries (Note 7)		(704,309	)		(704,309	)		(704,309	)		(704,309	)
Shares outstanding – beginning of period		26,417,062			24,307,630			25,235,583			24,043,904
Weighted average shares issued during the period		425,714			158,184			1,055,514			209,903
Diluted weighted average shares – end of period		26,842,776			24,465,814			26,291,097			24,253,807