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Earnings (Loss) Per Share (Tables)
6 Months Ended
Aug. 31, 2017
Earnings Loss Per Share Tables  
Computation of basic and diluted earnings per share
   Six Months Ended
August 31,
   Three Months Ended
August 31,
 
   2017   2016   2017   2016 
                 
Denominator for basic earnings (loss) per share   14,961,137    14,961,076    14,961,197    14,961,076 
                     
Dilutive effect of stock options   98,889        103,434     
                     
Denominator for diluted earnings (loss) per share   15,060,026    14,961,076    15,064,631    14,961,076