Line-of-Credit (Detail) (USD $)	Aug. 30, 2013	May 31, 2013
Line Of Credit Facility [Abstract]
Line-of-credit agreement, maximum borrowing capacity	$ 3,000,000	$ 3,000,000
Line-of-credit, outstanding debt	1,954,666	1,725,289
Line-of-credit, interest rate	3.25%	3.25%
Line-of-credit, available credit	$ 1,045,334	$ 1,274,711