Note 12 - Stock Option Activity (Details) - $ / shares	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Balance (in shares)	3,364,117	2,463,369
Balance (in dollars per share)	$ 5.58	$ 9.09
Granted (in shares)	1,636,667	1,432,000
Granted (in dollars per share)	$ 2.17	$ 2.42
Exercised (in shares)
Exercised (in dollars per share)
Forfeited or expired (in shares)	(249,361)	(531,252)
Forfeited or expired (in dollars per share)	$ 12.77	$ 13.37
Balance (in shares)	4,751,423	3,364,117
Balance (in dollars per share)	$ 4.07	$ 5.58
Balance	6 years 219 days	7 years 328 days