Consolidated Statements of Shareholders' Equity - USD ($)	Stock Compensation Plan [Member] Common Stock Including Additional Paid in Capital [Member]	Stock Compensation Plan [Member]	Restricted Stock Units (RSUs) [Member] Common Stock Including Additional Paid in Capital [Member]	Restricted Stock Units (RSUs) [Member]	Common Stock Including Additional Paid in Capital [Member]	Key Executive Deferred Compensation [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Jun. 30, 2014					24,430,000	(307,000)
Balance at Jun. 30, 2014					$ 106,979,000	$ (2,915,000)	$ 34,348,000	$ 138,412,000
Net income							5,151,000	5,151,000
Stock compensation awards (in shares)					27,000
Stock compensation awards					$ 191,000			191,000
Distribution of treasury shares, net (in shares)						80,000
Distribution of treasury shares, net						$ 770,000		770,000
Deferred compensation plan					(761,000)			(761,000)
Stock option expense					$ 1,239,000			$ 1,238,897
Stock options exercised, net (in shares)					163,000			163,076
Stock options exercised, net					$ 850,000			$ 850,000
Dividends							(2,900,000)	(2,900,000)
Balance (in shares) at Jun. 30, 2015					24,620,000	(227,000)
Balance at Jun. 30, 2015					$ 108,498,000	$ (2,145,000)	36,599,000	142,952,000
Net income							9,482,000	9,482,000
Stock compensation awards (in shares)	23,000		5,000
Stock compensation awards	$ 248,000	$ 248,000
Purchase of treasury shares, net (in shares)						(1,000)
Purchase of treasury shares, net						$ (23,000)		(23,000)
Deferred compensation plan					151,000			151,000
Stock option expense								2,519,092
Stock-based compensation expense					$ 2,903,000			$ 2,903,000
Stock options exercised, net (in shares)					562,000			561,946
Stock options exercised, net					$ 4,021,000			$ 4,021,000
Dividends							(4,214,000)	(4,214,000)
Balance (in shares) at Jun. 30, 2016					25,210,000	(228,000)
Balance at Jun. 30, 2016					$ 115,821,000	$ (2,168,000)	41,867,000	155,520,000
Net income							3,000,000	3,000,000
Stock compensation awards (in shares)	40,000		25,000
Stock compensation awards	$ 409,000	$ 409,000
Stock Warrants Issued					575,000			575,000
Purchase of treasury shares, net (in shares)						(30,000)
Purchase of treasury shares, net						$ (276,000)		(276,000)
Deferred compensation plan					237,000			237,000
Stock option expense								2,478,861
Stock-based compensation expense					$ 3,049,000			$ 3,049,000
Stock options exercised, net (in shares)					412,000			486,446
Stock options exercised, net					$ 2,612,000			$ 2,612,000
Dividends							(5,048,000)	(5,048,000)
Balance (in shares) at Jun. 30, 2017					25,687,000	(258,000)
Balance at Jun. 30, 2017					$ 122,703,000	$ (2,444,000)	$ 39,819,000	$ 160,078,000