Note 5 - Warrant Activity (Details) - Warrants [Member]	6 Months Ended
	Dec. 31, 2015 $ / shares shares
Beginning balance (in shares) | shares	5,052,400
Beginning balance (in dollars per share) | $ / shares	$ 2.21
Warrants granted (in shares) | shares	34,191,176
Warrants granted (in dollars per share) | $ / shares	$ 0.68
Ending balance (in shares) | shares	38,739,880
Ending balance (in dollars per share) | $ / shares	$ 0.88
Warrants exercisable at, (in shares) | shares	17,085,468
Warrants exercisable at, (in dollars per share) | $ / shares	$ 1.13