XML 30 R23.htm IDEA: XBRL DOCUMENT v3.19.3
Long-Term Debt - Mortgage (Tables)
3 Months Ended
Oct. 31, 2019
Debt Disclosure [Abstract]  
Schedule of long-term debt
      October 31, 2019 July 31, 2019
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 4.375 % 12/1/2024 $      777,736 $      4,478,184 $      5,298,610 $       
Less: Deferred financing costs 6,730 11,448
Total $ 777,736 $ 4,471,454 $ 5,287,162 $