CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)	6 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Cash Flows From Operating Activities:
Net income	$ 71,263	$ 214,766
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	782,387	939,284
Loss on disposition of property and equipment	54,121
Amortization of deferred charges	139,600	163,280
Operating lease expense in excess of cash payments	559,248
Deferred finance costs included in interest expense	15,401	11,438
Net realized and unrealized (gain) loss on sale of marketable securities	(110,231)	95,802
Other assets - unbilled receivables	42,703	(69,091)
Other assets - deferred charges	(46,585)	(553,137)
Deferred income taxes	27,000	112,000
Changes in:
Receivables	38,592	(126,680)
Real estate taxes refundable		(45,025)
Income taxes refundable	9,683	3,028
Prepaid expenses	95,847	129,065
Accounts payable	75,236	(28,105)
Payroll and other accrued liabilities (Notes 1 and 10)	687,282	231,108
Income taxes payable	8,912
Other taxes payable	(4,247)	(4,520)
Cash provided by operating activities	2,446,212	1,073,213
Cash Flows From Investing Activities:
Acquisition of property and equipment	(3,419,989)	(1,699,924)
Marketable securities:
Receipts from sales	447,236	219,744
Payments for purchases	(527,048)	(296,660)
Cash (used) by investing activities	(3,499,801)	(1,776,840)
Cash Flows From Financing Activities:
Borrowing - Mortgage debt	144,080
Increase (decrease) - security deposits payable	(58,452)	9,453
Mortgage and other debt payments	(122,872)	(82,698)
Mortgage financing costs paid	(118,571)
Cash (used) by financing activities	(155,815)	(73,245)
Decrease in cash, cash equivalents and restricted cash	(1,209,404)	(776,872)
Cash, cash equivalents and restricted cash at beginning of period	5,263,724	6,879,623
Cash, cash equivalents and restricted cash at end of period (Note 10)	$ 4,054,320	$ 6,102,751