Note 9 - Summary of Unvested Stock Options (Details) - $ / shares	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Unvested at June 30, 2015 (in shares)	1,080,198
Unvested at June 30, 2015 (in dollars per share)	$ 2.99
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	1,026,800	734,323	436,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 3.64	$ 3.27	$ 2.67
Vested (in shares)	(395,693)
Vested (in dollars per share)	$ 2.95
Forfeited (in shares)	(47,800)
Forfeited (in dollars per share)	$ 3.30
Unvested at June 30, 2016 (in shares)	1,663,505	1,080,198
Unvested at June 30, 2016 (in dollars per share)	$ 3.39	$ 2.99