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Consolidated Statements Of Comprehensive Income And Changes In Shareholders' Equity (USD $)
Comprehensive Income: [Member]
Common Stock: [Member]
Additional Paid-In Capital: [Member]
Retained Earnings: [Member]
Treasury Stock: [Member]
Accumulated Other Comprehensive Income: [Member]
Total
Balance at beginning of year at Jan. 31, 2010   $ 416,146 $ 34,712,369 $ 26,816,899 $ (8,030,335) $ 317,468  
Net Income 2,061,769     2,061,769     2,061,769
Other Comprehensive Loss, net of taxes and reclassification adjustments:              
Foreign currency translation adjustments (65,677)            
Unrealized gain on securities available for sale 14,722            
Other comprehensive loss (50,955)         (50,955)  
Comprehensive Income 2,010,814            
Par value (proceeds) from the exercise of employee stock options   7,029 505,609        
Employee option exercise and buyback   9,842 639,732        
Share-based compensation     333,240        
Tax benefit of employee stock options     384,503        
Shares issued to employee stock ownership plan         148,605    
Contribution of treasury shares to employee stock options plan     10,773        
Dividends paid       (2,035,778)      
Purchase of treasury stock         (975,682)    
Purchase of common stock from related parties         (982,640)    
Balance at end of year at Jan. 31, 2011   433,017 36,586,226 26,842,890 (9,840,052) 266,513 54,288,594
Net Income 3,131,691     3,131,691     3,131,691
Other Comprehensive Loss, net of taxes and reclassification adjustments:              
Foreign currency translation adjustments (151,777)            
Unrealized gain on securities available for sale 6,535            
Other comprehensive loss (145,242)         (145,242)  
Comprehensive Income 2,986,449            
Par value (proceeds) from the exercise of employee stock options   941 79,565        
Employee option exercise and buyback   13,871 774,737        
Share-based compensation     207,884        
Tax benefit of employee stock options     305,656        
Shares issued to employee stock ownership plan         88,150    
Contribution of treasury shares to employee stock options plan     10,136        
Dividends paid       (2,055,214)      
Purchase of common stock from related parties         (1,037,903)    
Balance at end of year at Jan. 31, 2012   $ 447,829 $ 37,964,204 $ 27,919,367 $ (10,789,805) $ 121,271 $ 55,662,866