Note 9 - Stockholders' Equity (Details) - Allocation of Recognized Period Costs - USD ($)	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
General and Administrative Expense [Member]
General and administrative:
Stock-based employee compensation expense	$ 972,137	$ 315,119
Research and Development Expense [Member]
General and administrative:
Stock-based employee compensation expense	122,672	(116,739)
Employee Stock Option [Member]
General and administrative:
Stock-based employee compensation expense	501,609	(204,257)
Employee Stock Option [Member] | General and Administrative Expense [Member]
General and administrative:
Stock-based employee compensation expense	378,937	(87,517)
Change in fair value from modification of Plan terms	369,283	307,638
Employee Stock Option [Member] | Research and Development Expense [Member]
General and administrative:
Stock-based employee compensation expense	122,672	(116,739)
Individual Employee [Member] | General and Administrative Expense [Member]
General and administrative:
Stock-based employee compensation expense		$ 94,998
Modification of Warrants [Member] | General and Administrative Expense [Member]
General and administrative:
Change in fair value from modification of Plan terms	$ 223,917