Consolidated Statements of Stockholders' Equity - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Jun. 30, 2013	10,447,227
Balance at Jun. 30, 2013	$ 104,000	$ 3,213,000	$ 176,972,000	$ 590,000	$ 180,879,000
Net earnings			7,051,000		7,051,000
Other comprehensive loss				(166,000)	$ (166,000)
Shares issued - Stock options exercised (in shares)	12,697				(12,697)
Shares issued - Stock options exercised	$ 1,000	155,000			$ 156,000
Stock based compensation expense		4,000			4,000
Dividends paid			(4,179,000)		(4,179,000)
Balance (in shares) at Jun. 30, 2014	10,459,924
Balance at Jun. 30, 2014	$ 105,000	3,372,000	179,844,000	424,000	183,745,000
Net earnings			9,055,000		9,055,000
Other comprehensive loss				(193,000)	$ (193,000)
Shares issued - Stock options exercised (in shares)					0
Stock based compensation expense		4,000			$ 4,000
Dividends paid			(4,393,000)		(4,393,000)
Balance (in shares) at Jun. 30, 2015	10,459,924
Balance at Jun. 30, 2015	$ 105,000	3,376,000	184,506,000	231,000	188,218,000
Net earnings			8,648,000		8,648,000
Other comprehensive loss				1,114,000	$ 1,114,000
Shares issued - Stock options exercised (in shares)					0
Stock based compensation expense		5,000			$ 5,000
Dividends paid			(4,603,000)		(4,603,000)
Balance (in shares) at Jun. 30, 2016	10,279,807
Balance at Jun. 30, 2016	$ 103,000	2,240,000	187,334,000	$ 1,345,000	191,022,000
Stock repurchased (in shares)	(180,117)
Stock repurchased	$ (2,000)	$ (1,141,000)	$ (1,217,000)		$ (2,360,000)