Significant Accounting Policies (Detail) - Reconciliation of the numerators and denominators of the basic and diluted earnings per share (USD $)	3 Months Ended		6 Months Ended
	Nov. 30, 2012	Nov. 30, 2011	Nov. 30, 2012	Nov. 30, 2011
Numerator:
Income from continuing operations (in Dollars)	$ 236,919	$ 195,092	$ 528,550	$ 312,884
Denominator for basic net income per common share	6,966,185	6,868,339	6,959,224	6,868,339
Effect of dilutive securities:
Options and warrants	418,954	51,957	322,978	40,041
Denominator for diluted net income per common share	7,385,139	6,920,296	7,282,202	6,908,380
Basic net income per common share (in Dollars per share)	$ 0.03	$ 0.03	$ 0.08	$ 0.05
Diluted net income per common share (in Dollars per share)	$ 0.03	$ 0.03	$ 0.07	$ 0.05