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Significant Accounting Policies (Detail) - Reconciliation of the numerators and denominators of the basic and diluted earnings per share (USD $)	3 Months Ended		9 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2013	Feb. 29, 2012
Numerator:
Income (loss) from continuing operations (in Dollars)	$ (35,614)	$ 181,445	$ 492,937	$ 494,329
Denominator for basic net income (loss) per common share	7,000,011	6,877,954	6,972,671	6,871,532
Effect of dilutive securities:
Options and warrants		247,606	438,246	174,926
Denominator for diluted net income(loss) per common share	7,000,011	7,125,560	7,410,917	7,046,458
Basic net income (loss) per common share (in Dollars per share)	$ (0.01)	$ 0.03	$ 0.07	$ 0.07
Diluted net income (loss) per common share (in Dollars per share)	$ (0.01)	$ 0.03	$ 0.07	$ 0.07

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