Note 9 - Equity Compensation (Details) (USD $)	3 Months Ended	6 Months Ended		9 Months Ended	12 Months Ended									12 Months Ended
	Dec. 31, 2012	Jun. 30, 2013	Sep. 30, 2012	Mar. 31, 2011	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2013 Employee Salary Deferrals or Company Contributions [Member]	Jun. 30, 2012 Employee Salary Deferrals or Company Contributions [Member]	Jun. 30, 2012 Employee Stock Option [Member]	Jun. 30, 2011 Employee Stock Option [Member]	Jun. 30, 2013 Total [Member]	Jun. 30, 2014 Minimum [Member]	Jun. 30, 2013 Minimum [Member]	Jun. 30, 2012 Minimum [Member]	Jun. 30, 2011 Minimum [Member]	Jun. 30, 2014 Maximum [Member]	Jun. 30, 2013 Maximum [Member]	Jun. 30, 2012 Maximum [Member]	Jun. 30, 2011 Maximum [Member]
Note 9 - Equity Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)		1,102,236			1,102,236
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Included In Available For Grant Transferred From Previous Plan (in Shares)		312,848			312,848
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number (in Shares)													2,341,150
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number (in Shares)		1,643,050			1,643,050	1,404,400	1,192,814
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized		$ 462,435			$ 462,435
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition					30 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)					414,750	36,000	288,200
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit (in Dollars per share)							$ 4.84								$ 6.28	$ 6.68
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit (in Dollars per share)							$ 8.92												$ 6.58	$ 7.22
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)															$ 2.00	$ 2.45	$ 1.60		$ 2.11	$ 2.60	$ 3.37
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term															11 years	14 years	9 years		9 years 5 months	9 years 8 months	9 years 5 months
Share-Based Compensation Valuation Assumptions Expected Forfeiture Rate	3.40%	3.60%	4.10%	3.00%				6.55%
Stock or Unit Option Plan Expense					842,401	410,000	851,000				410,550	851,755
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number (in Shares)		2,331,830			2,331,830
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price (in Dollars per share)		$ 9.97			$ 9.97
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value		1,530,297			1,530,297
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term					5 years 219 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value					95,223	3,365	6,526
Proceeds from Stock Options Exercised					175,023	14,235	58,800
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period (in Shares)					8,092	7,076	6,256
Stock Issued During Period, Value, Share-based Compensation, Gross					56,700	47,700	40,900
Treasury Stock, Shares (in Shares)		288,505			288,505	266,615
Treasury Stock, Value		2,791,000			2,791,000	2,641,000
Treasury Stock, Value, Acquired, Cost Method					$ (150,000)	$ (141,000)	$ (96,000)		$ 175,100	$ 154,300
Treasury Stock, Shares, Acquired (in Shares)					25,549	22,855
Treasury Stock Acquired, Repurchase Authorization														22,000				25,000