CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
	Apr. 30, 2018	Apr. 30, 2017
Cash Flows From Operating Activities:
Net income	$ 3,167,496	$ 1,391,821
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	1,311,386	1,253,091
Amortization of deferred charges	222,600	200,900
Deferred finance costs included in interest expense	17,154	17,154
Realized (gain) loss on sale of marketable securities	805	(23,734)
Other assets - unbilled receivables	204,016	160,661
Other assets - deferred charges	(20,488)	(366,995)
Provision (benefit) for deferred income taxes	(2,063,000)	706,000
Deferred revenue		(875,001)
Changes in:
Receivables	101,563	153,645
Income taxes refundable	(40,369)	(5,608)
Prepaid expenses	721,673	687,443
Accounts payable	(60,703)	15,757
Payroll and other accrued liabilities	(660,481)	136,675
Other taxes payable	(1,835)	(1,563)
Cash provided by operating activities	2,899,817	3,450,246
Cash Flows From Investing Activities:
Acquisition of property and equipment	(1,831,066)	(1,635,496)
Restricted cash	(318,828)	(134,846)
Marketable securities:
Receipts from sales	268,857	282,434
Payments for purchases	(98,340)	(839,970)
Cash (used) by investing activities	(1,979,377)	(2,327,878)
Cash Flows From Financing Activities:
Increase - security deposits payable	297,653	134,846
Mortgage and other debt payments	(121,238)	(1,116,961)
Cash provided (used) by financing activities	176,415	(982,115)
Increase in cash and cash equivalents	1,096,855	140,253
Cash and cash equivalents at beginning of period	5,381,195	5,228,826
Cash and cash equivalents at end of period	$ 6,478,050	$ 5,369,079