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Line-of-Credit (Detail) (USD $)
Feb. 28, 2014
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 1,979,488 1,725,289
Line-of-credit, interest rate 3.25% 3.25%
Line-of-credit, available credit $ 1,020,512 $ 1,274,711