CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)	3 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Cash Flows From Operating Activities:
Net income (loss)	$ (415,424)	$ 128,544
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Bad debt recovery	(18,000)
Provision (Benefit) for deferred income taxes	(157,000)	74,000
Depreciation	443,939	387,410
Amortization of deferred charges	95,200	68,000
Operating lease expense in excess of cash payments	340,380	276,762
Deferred finance costs included in interest expense	9,628	4,718
Net realized and unrealized (gain) loss on marketable securities	131,778	(23,223)
Changes in:
Receivables	(205,470)	38,743
Prepaid expenses and other assets	1,243,044	978,085
Accounts payable and accrued expenses	(289,710)	215,446
Security deposits payable		(19,606)
Cash provided by operating activities	1,178,365	2,128,879
Cash Flows From Investing Activities:
Acquisition of property and equipment	(528,908)	(1,445,669)
Marketable securities:
Receipts from sales	494,990	442,764
Payments for purchases	(489,089)	(443,299)
Cash used in investing activities	(523,007)	(1,446,204)
Cash Flows From Financing Activities:
Payments - mortgage and other debt payments	(281,717)	(42,690)
Cash used in financing activities	(281,717)	(42,690)
Increase in cash, cash equivalents and restricted cash	373,641	639,985
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	$ 4,777,442	$ 5,903,709