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Long-Term Debt - Mortgage (Tables)
 6 Months Ended
Jan. 31, 2016
Long-Term Debt - Mortgage: [Abstract]  
Schedule of long-term debt
January 31, 2016 July 31, 2015
Current
Annual Final Due Due Due Due
  Interest Payment Within After Within After
Rate Date One Year One Year One Year One Year
           Bond St. building, Brooklyn, NY       3.54%       2/01/20       $      153,511       $      5,709,650       $      150,763       $      5,786,525