CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	3 Months Ended
	Oct. 31, 2012	Oct. 31, 2011
Cash Flows From Operating Activities:
Net income	$ 500,774	$ 372,177
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	401,257	386,797
Amortization of deferred charges	86,433	81,700
Realized loss on sale of marketable securities	517	8,202
Deferred income taxes	3,000	(80,000)
Other assets - unbilled receivables	(66,226)	(98,097)
Changes in:
Receivables	(46,695)	17,573
Income taxes refundable	0	315,577
Prepaid expenses	592,608	601,692
Accounts payable	(14,793)	(3,379)
Payroll and other accrued liabilities	(190,709)	275,290
Income taxes payable	158,698	70,194
Other taxes payable	2,652	2,797
Cash provided by operating activities	1,427,516	1,950,523
Cash Flows From Investing Activities:
Capital expenditures	(228,153)	(437,587)
Security deposits	(5,105)	32,450
Marketable securities:
Receipts from sales or maturities	99,816	179,941
Payments for purchases	(253,322)	(179,368)
Cash (used) by investing activities	(386,764)	(404,564)
Cash Flows From Financing Activities:
Increase (decrease) - security deposits	5,104	(30,285)
Mortgage and other debt payments	(37,793)	(2,167,232)
Cash (used) by financing activities	(32,689)	(2,197,517)
Increase (decrease) in cash and cash equivalents	1,008,063	(651,558)
Cash and cash equivalents at beginning of period	1,340,203	2,656,354
Cash and cash equivalents at end of period	$ 2,348,266	$ 2,004,796