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Aggregate grant date fair value of options vested.

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Unrecognized cost of unvested share-based compensation awards.

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Note 9 - Equity Compensation (Details Textual)		12 Months Ended				39 Months Ended
Note 9 - Equity Compensation (Details Textual)	Apr. 01, 2016	Jun. 30, 2016 USD ($) $ / shares shares	Jun. 30, 2015 USD ($) $ / shares shares	Jun. 30, 2014 USD ($) $ / shares shares	Jun. 30, 2013 shares	Mar. 31, 2016
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms		3 years
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized		$ 234,320
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition		2 years 240 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number \| shares		62,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value \| $ / shares		$ 9.39
Share Based Compensation Valuation Assumptions Expected Forfeiture Rate		3.30%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period \| shares		72,000	0
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		4 years
Dividends		$ 10,625
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period \| shares		5,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period \| shares		4,500
Sharebased Compensation Arrangement By Sharebased Payment Award Equity Other Than Options Expected To Vest Outstanding Number \| shares		60,794
Allocated Share-based Compensation Expense		$ 383,483
Performance Shares [Member] \| Annually [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		33.30%
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term		9 years	9 years 153 days	9 years 62 days
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price \| $ / shares		$ 8.84	$ 5.96	$ 7.20
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value \| $ / shares		$ 3.28	$ 2.19	$ 2.64
Share Based Compensation Valuation Assumptions Expected Forfeiture Rate						2.00%
Treasury Stock Acquired, Repurchase Authorization, Shares Expected \| shares		35,000
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term		9 years 244 days	9 years 273 days	9 years 182 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term		10 years
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price \| $ / shares		$ 11.87	$ 8.23	$ 8.44
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value \| $ / shares		$ 4.52	$ 3.89	$ 3.64
Share Based Compensation Valuation Assumptions Expected Forfeiture Rate						3.30%
Treasury Stock Acquired, Repurchase Authorization, Shares Expected \| shares		39,000
Non-Employee Directors [Member] \| Each Ninety Days [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		25.00%
Employees [Member] \| Annually [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		25.00%
Excluding Tax Effect of Disqualified Dispositions [Member]
Proceeds from Stock Options Exercised		$ 4,124,047	$ 1,092,002	$ 377,401
Employee Salary Deferrals or Company Contributions [Member]
Treasury Stock, Value, Acquired, Cost Method			$ 363,400	$ 205,600
Treasury Stock, Shares, Acquired \| shares			36,685	27,902
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term		4 years	4 years 109 days	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term		6 years 219 days	6 years 36 days	5 years 146 days	5 years 219 days
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant \| shares		1,612,095
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number \| shares		2,976,490	2,677,436	2,677,464	2,341,150
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number \| shares		1,312,985	1,597,238	1,874,326
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized		$ 2,458,925
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition		2 years 90 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross \| shares		1,026,800	734,323	436,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price \| $ / shares		$ 9.39	$ 6.83	$ 7.24
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value \| $ / shares		$ 3.64	$ 3.27	$ 2.67
Share Based Compensation Valuation Assumptions Expected Forfeiture Rate	3.30%
Stock or Unit Option Plan Expense		$ 2,519,092	$ 1,238,897	$ 1,004,676
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number \| shares		2,939,224
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price \| $ / shares		$ 8.98
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value		$ 8,246,362
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term		6 years 182 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value		$ 1,695,213	212,106	142,715
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Aggregate Grant Date Fair Value		1,168,192	822,827	777,825
Proceeds from Stock Options Exercised		4,021,000	850,000	$ 399,000
Increase (Decrease) in Income Taxes Payable		595,483	71,643
Increase (Decrease) In Common Stock Related To Stock Option Exercise		102,010	242,385
Reduction of Income Tax Expense Related to Stock Option Exercises		141,349	30,149
Reduction of Deferred Tax Asset Related to Stock Option Exercises		$ 556,144	$ 283,888
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period \| shares		23,838	26,850	23,205
Stock Issued During Period, Value, Share-based Compensation, Gross		$ 248,000	$ 191,000	$ 192,100
Deferred Compensation Plan, Number of Participants		28
Treasury Stock, Shares \| shares		228,100	226,600
Treasury Stock, Value		$ 2,167,700	$ 2,145,100
Treasury Stock, Value, Acquired, Cost Method		$ 23,000		$ 124,000