Note 9 - Equity Compensation (Details) - Stock Options - USD ($)	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Stock Options [Abstract]
Outstanding - Shares	2,677,436	2,677,464	2,341,150	2,006,250
Outstanding - Weighted Average Exercise Price	$ 8.85	$ 9.57	$ 9.95	$ 10.64
Outstanding - Weighted Average Remaining Contractual Term	6 years 36 days	5 years 146 days	5 years 219 days	5 years 292 days
Outstanding - Aggregate Intrinsic Value	$ 4,914,601	$ 1,674,010	$ 1,544,896	$ 654,747
Exercisable - Shares	1,597,238	1,874,326	1,643,050
Exercisable - Weighted Average Exercise Price	$ 10.18	$ 10.74	$ 11.34
Exercisable - Weighted Average Remaining Contractual Term	4 years 109 days	4 years	4 years 219 days
Exercisable - Aggregate Instrinsic Value	$ 2,250,093	$ 750,925	$ 524,522
Granted - Shares	734,323	436,000	414,750
Granted - Weighted Average Exercise Price	$ 6.83	$ 7.24	$ 6.58
Forfeitures - Shares	(571,275)	(39,050)	(44,350)
Forfeitures - Weighted Average Exercise Price	$ 10.26	$ 11.59	$ 13.61
Exercised - Shares	(163,076)	(60,636)	(35,500)
Exercised - Weighted Average Exercise Price	$ 6.70	$ 6.22	$ 4.93