Note 10 - Equity Compensation - Summary of Unvested Stock Options (Details) - $ / shares	3 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Unvested at June 30, 2016 (in shares)	1,663,505
Unvested at June 30, 2016 (in dollars per share)	$ 3.39
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	832,500	942,800
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 3.83	$ 3.65
Vested (in shares)	(408,766)
Vested (in dollars per share)	$ 3.26
Forfeited (in shares)	(25,500)
Forfeited (in dollars per share)	$ 3.50
Unvested at September 30, 2016 (in shares)	2,061,739
Unvested at September 30, 2016 (in dollars per share)	$ 3.59