Income Taxes (Schedule of Tax Effects of Temporary Differences that Result in Deferred Tax Assets and Liabilities) (Detail) (USD $)	May 31, 2013	Jun. 01, 2012
Deferred tax assets
Salary continuation plan	$ 467,194	$ 486,108
Accrued vacation	539,495	518,946
Inventory capitalization	65,515	72,937
Allowance for doubtful accounts	26,600	26,600
Other accrued expenses	141,511	118,960
Gross deferred tax assets before valuation allowance	1,240,315	1,223,551
Less valuation allowance
Total deferred tax assets	1,240,315	1,223,551
Deferred tax liabilities
Property and equipment	3,867,929	4,031,269
Prepaid expenses	80,570	86,405
Total deferred tax liabilities	3,948,499	4,117,674
Net deferred tax liability	$ 2,708,184	$ 2,894,123