CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	9 Months Ended
	Apr. 30, 2014	Apr. 30, 2013
Cash Flows From Operating Activities
Net income	$ 597,289	$ 562,843
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,270,828	1,208,221
Amortization of deferred charges	263,172	314,810
Realized (gain) loss on sale of marketable securities	(182,846)	3,322
Loss on disposition of property and equipment	4,291	316,021
Other assets - unbilled receivables	(338,056)	(196,119)
Other assets - unbilled receivable - bad debts		240,258
Other assets - deferred charges	(289,155)	(636,401)
Deferred income taxes	454,000	148,000
Changes in:
Receivables	(278,694)	95,062
Income taxes refundable	14,066	(281,073)
Prepaid expenses	539,455	609,520
Accounts payable	76,804	(30,197)
Payroll and other accrued liabilities	186,516	737,292
Income taxes payable		(79,362)
Other taxes payable	6,317	6,483
Net cash provided by operating activities	2,323,987	3,018,680
Cash Flows From Investing Activities
Capital expenditures	(2,263,171)	(1,941,955)
Security deposits	(301,257)	67,150
Marketable securities:
Receipts from sales or maturities	1,247,403	548,818
Payments for purchases	(49,889)	(545,615)
Cash (used) by investing activities	(1,366,914)	(1,871,602)
Cash Flows From Financing Activities
Decrease - security deposits	(75,210)	(138,150)
Mortgage and other debt payments	(126,283)	(117,653)
Cash (used) by financing activities	(201,493)	(255,803)
Increase in cash and cash equivalents	755,580	891,275
Cash and cash equivalents at beginning of period	664,718	1,340,203
Cash and cash equivalents at end of period	$ 1,420,298	$ 2,231,478