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Related Party Transactions (Schedule of Rent Payments Expenses) (Details) - USD ($)
3 Months Ended 6 Months Ended
Jan. 31, 2021
Jan. 31, 2020
Jan. 31, 2021
Jan. 31, 2020
Rent Payments $ 246,814 $ 246,814 $ 493,628 $ 493,628
Rent Expense 466,968 491,307 933,938 982,616
Jamaica Avenue at 169th Street [Member]        
Rent Payments 156,250 156,250 312,500 312,500
Rent Expense 379,359 403,698 758,719 807,397
504-506 Fulton Street [Member]        
Rent Payments 90,564 90,564 181,128 181,128
Rent Expense $ 87,609 $ 87,609 $ 175,219 $ 175,219