CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)	6 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Cash Flows From Operating Activities:
Net income (loss)	$ (469,531)	$ 71,263
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Bad debt expense	74,000	40,292
Provision (Benefit) for deferred income taxes	(197,000)	27,000
Disposition of property and equipment		54,121
Depreciation	889,443	782,387
Amortization of deferred charges	193,200	139,600
Operating lease expense in excess of cash payments	675,808	559,248
Deferred finance costs included in interest expense	19,056	15,401
Deferred Charges	(1,138,562)
Net realized and unrealized (gain) on marketable securities	(107,190)	(110,231)
Changes in:
Receivables	(525,834)	41,003
Prepaid expenses and other assets	142,108	58,945
Accounts payable and accrued expenses	519,486	767,183
Security deposits payable	60,000	(58,452)
Cash provided by operating activities	134,984	2,387,760
Cash Flows From Investing Activities:
Property and equipment costs	(1,494,147)	(3,419,989)
Marketable securities:
Receipts from sales	494,990	447,236
Payments for purchases	(566,971)	(527,048)
Cash used in investing activities	(1,566,128)	(3,499,801)
Cash Flows From Financing Activities:
Proceeds from borrowing - mortgage		144,080
Payments - mortgage and other debt	(566,567)	(122,872)
Mortgage financing cost paid		(118,571)
Cash used in financing activities	(566,567)	(97,363)
Decrease in cash, cash equivalents and restricted cash	(1,997,711)	(1,209,404)
Cash, cash equivalents and restricted cash at beginning of period	4,403,801	5,263,724
Cash, cash equivalents and restricted cash at end of period	$ 2,406,090	$ 4,054,320