Note 5 - Warrant Activity (Details) - Warrants [Member]	3 Months Ended
	Sep. 30, 2015 $ / shares shares
Beginning balance (in shares) | shares	5,052,400
Beginning balance (in dollars per share)	$ 2.21
Warrants granted (in shares) | shares	34,191,176
Warrants granted (in dollars per share)	$ 0.68
Ending balance (in shares) | shares	39,243,576
Ending balance (in dollars per share)	$ 0.88
Warrants exercisable at September 30, 2015 (in shares) | shares	5,052,400
Warrants exercisable at September 30, 2015 (in dollars per share)	$ 2.21