Operating Leases (Schedule of Revenues by Lease and Non-Lease Components) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2021	Jan. 31, 2020
Leases [Abstract]
Base rent - fixed	$ 4,629,553	$ 4,515,930	$ 9,062,131	$ 9,052,029
Reimbursements of common area costs	152,164	163,775	306,695	313,435
Non-lease components (real estate taxes)	265,150	359,355	513,035	709,511
Rental income	$ 5,046,867	$ 5,039,060	$ 9,881,861	$ 10,074,975