CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	3 Months Ended
	Oct. 31, 2016	Oct. 31, 2015
Cash Flows From Operating Activities
Net income	$ 462,025	$ 401,375
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	412,627	406,750
Amortization of deferred charges	64,600	80,879
Amortization of deferred finance costs	5,718	5,700
Realized loss on sale of marketable securities	7,421
Other assets - unbilled receivables	95,032	94,936
Deferred income taxes	231,000	239,000
Deferred revenue	(291,667)	(291,667)
Changes in:
Receivables	(288,093)	131,187
Income taxes refundable	3,107	(174,654)
Prepaid expenses	627,144	578,417
Accounts payable	4,588	29,509
Payroll and other accrued liabilities	24,094	(207,296)
Other taxes payable	(2,760)	(2,709)
Cash provided by operating activities	1,354,836	1,291,427
Cash Flows From Investing Activities
Capital expenditures	(516,320)	(821,347)
Security deposits	(2,147)	(3,679)
Marketable securities:
Receipts from sales or maturities	115,173
Payments for purchases	(130,197)	(9,541)
Cash (used) by investing activities	(533,491)	(834,567)
Cash Flows From Financing Activities
Increase - security deposits	4,152	1,579
Mortgage and other debt payments	(38,262)	(36,895)
Cash (used) by financing activities	(34,110)	(35,316)
Increase in cash and cash equivalents	787,235	421,544
Cash and cash equivalents at beginning of period	5,228,826	4,085,704
Cash and cash equivalents at end of period	$ 6,016,061	$ 4,507,248