CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)	3 Months Ended
	Oct. 31, 2019	Oct. 31, 2018
Cash Flows From Operating Activities:
Net income (loss)	$ 128,544	$ (79,194)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	387,410	466,297
Amortization of deferred charges	68,000	81,282
Operating lease expense in excess of cash payments	276,762
Deferred finance costs included in interest expense	4,718	5,719
Net realized and unrealized (gain) loss on sale of marketable securities	(23,223)	34,059
Other assets - unbilled receivables	42,472	(6,861)
Other assets - deferred charges		(304,252)
Deferred income taxes	74,000	3,000
Changes in:
Receivables	(3,729)	51,710
Income taxes refundable	(384)	(13,048)
Prepaid expenses	978,469	836,915
Accounts payable	17,671	(16,205)
Payroll and other accrued liabilities (Notes 1 and 10)	201,080	714,224
Other taxes payable	(3,305)	(2,940)
Cash provided by operating activities	2,148,485	1,770,706
Cash Flows From Investing Activities:
Acquisition of property and equipment	(1,445,669)	(822,175)
Marketable securities:
Receipts from sales	442,764
Payments for purchases	(443,299)	(16,088)
Cash (used) by investing activities	(1,446,204)	(838,263)
Cash Flows From Financing Activities:
Increase (decrease) - security deposits payable	(19,606)	9,153
Mortgage and other debt payments	(42,690)	(41,161)
Cash (used) by financing activities	(62,296)	(32,008)
Increase in cash, cash equivalents and restricted cash	639,985	900,435
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)	$ 5,903,709	$ 7,780,058