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Earnings Per Share (Tables)
6 Months Ended
Aug. 31, 2019
Earnings Per Share - Denominator For Calculation Of Diluted Earnings Per Share  
Computation of basic and diluted earnings per share
   Six Months Ended
August 31,
   Three Months Ended
August 31,
 
   2019   2018   2019   2018 
                 
Numerator for basic and diluted earnings per share  $139,978   $80,554   $114,765   $59,124 
                     
Denominator for basic earnings per share – weighted average   15,285,024    15,036,644    15,301,613    15,085,660 
                     
Effects of dilutive securities                    
Stock options for employees, directors and outside consultants   91,882    132,566    97,550    138,561 
                     
Denominator for diluted earnings per share   15,376,906    15,169,210    15,399,163    15,224,221 
                     
Basic earnings per share  $0.01   $0.01   $0.01   $0.00 
Diluted earnings per share  $0.01   $0.01   $0.01   $0.00