CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	6 Months Ended
	Jan. 31, 2013	Jan. 31, 2012
Cash Flows From Operating Activities:
Net income	$ 489,806	$ 685,922
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	803,742	780,134
Amortization of deferred charges	218,844	172,800
Realized loss on sale of marketable securities	517	14,232
Loss on disposition of property and equipment	316,021	0
Other assets - unbilled receivables	107,805	(273,171)
- deferred charges	(270,332)	(74,739)
Deferred income taxes	(118,000)	157,000
Changes in:
Receivables	(163,870)	(62,267)
Income taxes refundable	0	211,589
Prepaid expenses	64,816	128,283
Accounts payable	(4,206)	(70,269)
Payroll and other accrued liabilities	492,002	434,835
Income taxes payable	(44,056)	0
Other taxes payable	4,485	2,045
Cash provided by operating activities	1,897,574	2,106,394
Cash Flows From Investing Activities:
Capital expenditures	(528,436)	(912,335)
Security deposits	83,327	22,565
Marketable securities:
Receipts from sales or maturities	100,122	455,387
Payments for purchases	(292,557)	(695,771)
Cash (used) by investing activities	(637,544)	(1,130,154)
Cash Flows From Financing Activities:
(Decrease) - security deposits	(23,927)	(47,780)
Mortgage and other debt payments	(76,273)	(2,221,428)
Cash (used) by financing activities	(100,200)	(2,269,208)
Increase (decrease) in cash and cash equivalents	1,159,830	(1,292,968)
Cash and cash equivalents at beginning of period	1,340,203	2,656,354
Cash and cash equivalents at end of period	$ 2,500,033	$ 1,363,386