Note 2 - Summary of Significant Accounting Policies (Tables)

6 Months Ended

Dec. 31, 2017

Notes Tables

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

	December 31,		June 30,
	2017		2017		2016
Common stock equivalents of convertible debentures		--		--		3,676,471
Vested Series A warrants		404,412		404,412		404,412
Unvested Series A warrants (1)		698,529		698,529		698,529
Warrants – other		3,725,782		3,725,782		3,725,782
Stock options		1,156,027		397,388		104,378
Restricted stock units		416		59,694		63,566
Total		5,985,166		5,285,805		8,673,138