Line-of-Credit (Detail) (USD $)	Mar. 01, 2013	Jun. 01, 2012
Line of Credit Facility [Line Items]
Line-of-credit agreement, maximum borrowing capacity	$ 3,000,000	$ 3,000,000
Line-of-credit, outstanding debt	1,736,955	1,293,698
Line-of-credit, interest rate	3.50%	3.50%
Line-of-credit, available credit	$ 1,263,045	$ 1,706,302