CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
	Apr. 30, 2016	Apr. 30, 2015
Cash Flows From Operating Activities:
Net income	$ 1,075,492	$ 1,189,547
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,223,036	1,287,067
Amortization of deferred charges	255,904	268,570
Realized (gain) loss on sale of marketable securities	36,999	(6,455)
(Gain) loss on dispositon of property and equipment	(500)	27,648
Other assets - unbilled receivables	288,034	(26,720)
- deferred charges	(63,105)	(425,495)
Deferred income taxes	497,000	734,000
Deferred revenue	(875,001)	(875,001)
Changes in:
Receivables	457,070	113,583
Income taxes refundable	162,399	(184,292)
Prepaid expenses	603,501	552,136
Accounts payable	56,361	(65,389)
Payroll and other accrued liabilities	(588,570)	(98,200)
Other taxes payable	(1,536)	(3,250)
Cash provided by operating activities	3,127,084	2,487,749
Cash Flows From Investing Activities:
Capital expenditures	(2,254,034)	(1,398,110)
Security deposits	(34,560)	29,711
Marketable securities:
Receipts from sales or maturities	314,008	344,271
Payments for purchases	(338,436)	(376,967)
Cash (used) by investing activities	(2,313,022)	(1,401,095)
Cash Flows From Financing Activities:
Increase - security deposits	$ 32,261	29,285
Increase - mortgage debt		652,274
Mortgage and other debt payments	$ (112,274)	(99,173)
Cash provided (used) by financing activities	(80,013)	582,386
Increase in cash and cash equivalents	734,049	1,669,040
Cash and cash equivalents at beginning of period	4,085,704	1,892,760
Cash and cash equivalents at end of period	$ 4,819,753	$ 3,561,800