Consolidated Statement Of Shareholders' Equity (USD $)	Common Stock At $1 Per Share - Shares And Amount [Member]	Additional Contributed Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Treasury Shares [Member]	Total
Balance at Jun. 01, 2010	$ 7,585,764	$ 65,222,878	$ (7,856,427)	$ 89,701,652	$ (34,559,851)	$ 120,094,016
Net earnings				7,081,475		7,081,475
Other comprehensive income, net of tax			612,711			612,711
Stock options exercised	1,000	(182,490)			855,444	673,954
Excess tax benefit from stock options exercised		208,223				208,223
Issuance of restricted stock		(166,338)			166,338
Stock based compensation expense		306,037				306,037
Treasury shares acquired					(2,559,711)	(2,559,711)
Other treasury shares re-issued		16,308			34,237	50,545
Employee stock purchase plan		3,057				3,057
Cash dividends, per share				(2,924,929)		(2,924,929)
Balance at Mar. 08, 2011	7,586,764	65,407,675	(7,243,716)	93,858,198	(36,063,543)	123,545,378
Net earnings				2,391,114		2,391,114
Other comprehensive income, net of tax			1,517,161			1,517,161
Stock options exercised		(3,944)			66,622	62,678
Excess tax benefit from stock options exercised		15,073				15,073
Stock based compensation expense		114,885				114,885
Treasury shares acquired					(2,120,513)	(2,120,513)
Employee stock purchase plan		1,945				1,945
Cash dividends, per share				171		171
Balance at May. 31, 2011	7,586,764	65,535,634	(5,726,555)	96,249,483	(38,117,434)	125,527,892
Net earnings				3,326,543		3,326,543
Other comprehensive income, net of tax			520,806			520,806
Stock options exercised		22,286			88,526	110,812
Excess tax benefit from stock options exercised		3,800				3,800
Issuance of restricted stock		(334,903)			334,903
Stock based compensation expense		569,679			248,132	817,811
Treasury shares acquired					(640,140)	(640,140)
Other treasury shares re-issued		8,886			21,247	30,133
Employee stock purchase plan		7,978				7,978
Cash dividends, per share				(2,317,988)		(2,317,988)
Balance at Mar. 06, 2012	$ 7,586,764	$ 65,813,360	$ (5,205,749)	$ 97,258,038	$ (38,064,766)	$ 127,387,647