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Income Per Share of Common Stock
 6 Months Ended
Jan. 31, 2016
Income Per Share of Common Stock: [Abstract]  
Income Per Share of Common Stock:
2. Income Per Share of Common Stock:
       

Income per share has been computed by dividing the net income for the periods by the weighted average number of shares of common stock outstanding during the periods, adjusted for the purchase of treasury stock. Shares used in computing income per share were 2,015,780 for the six months ended January 31, 2016 and January 31, 2015.