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SHAREHOLDERS' EQUITY (Detail) (USD $)
0 Months Ended 12 Months Ended 12 Months Ended
Apr. 30, 2012
Jan. 31, 2012
May 31, 2011
Feb. 28, 2011
May 31, 2012
May 31, 2011
Aug. 31, 1999
1999 Plan
May 31, 2012
2010 Plan
May 31, 2011
Option and Warrants
May 31, 2012
Stock Option [Member]
May 31, 2012
Employee
May 31, 2011
Employee
May 31, 2012
Minimum [Member]
May 31, 2012
Maximum [Member]
Stock option and restricted stock plans, shares available (in Shares)             1,000,000 850,000            
Weighted Average Fair value of Option And Warrants         $ 0.44 $ 0.39                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value         8,800 10,200                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value     23,000   232,000 23,000                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value     3,000   79,000 3,000                
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized         43,569                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term, Minimum         3.08                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term, Maximum         3.82                  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares) 10,000 402,500 175,000 173,000 412,500 348,000                
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price (in Dollars per share)       $ 0.38                    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period       5 years                    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term 0.73 0.43 0.40                   0.38 0.73
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period five five five                      
Common Stock, Shares, Issued (in Shares)     6,868,339   6,952,339 6,868,339     207,500 84,000        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)     0.40     0.40                
Proceeds from Stock Options Exercised                     $ 47,790 $ 83,000