CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	9 Months Ended
Apr. 30, 2015	Apr. 30, 2014
Cash Flows From Operating Activities:
Net income	$ 1,189,547us-gaap_NetIncomeLoss	$ 597,289us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,287,067	1,270,828
Amortization of deferred charges	268,570us-gaap_AmortizationOfDeferredCharges	263,172us-gaap_AmortizationOfDeferredCharges
Realized (gain) on sale of marketable securities	(6,455)us-gaap_GainLossOnInvestments	(182,846)us-gaap_GainLossOnInvestments
Loss on disposition of property and equipment	27,648us-gaap_GainLossOnDispositionOfAssets	4,291us-gaap_GainLossOnDispositionOfAssets
Other assets - unbilled receivables	(26,720)	(338,056)
- deferred charges	(425,495)mays_OtherAssetsDeferredCharges	(289,155)mays_OtherAssetsDeferredCharges
Deferred income taxes	734,000	454,000
Deferred revenue	(875,001)
Changes in:
Receivables	113,583us-gaap_IncreaseDecreaseInReceivables	(278,694)us-gaap_IncreaseDecreaseInReceivables
Income taxes refundable	(184,292)	14,066
Prepaid expenses	552,136	539,455
Accounts payable	(65,389)	76,804
Payroll and other accrued liabilities	(98,200)	186,516
Other taxes payable	(3,250)	6,317
Cash provided by operating activities	2,487,749	2,323,987
Cash Flows From Investing Activities:
Capital expenditures	(1,398,110)	(2,263,171)
Security deposits	29,711mays_PaymentsToSecurityDeposits	(301,257)mays_PaymentsToSecurityDeposits
Marketable securities:
Receipts from sales or maturities	344,271	1,247,403
Payments for purchases	(376,967)	(49,889)
Cash (used) by investing activities	(1,401,095)	(1,366,914)
Cash Flows From Financing Activities:
Increase (decrease) - security deposits	29,285	(75,210)
Increase - mortgage debt	652,274
Mortgage and other debt payments	(99,173)us-gaap_RepaymentsOfLongTermDebt	(126,283)us-gaap_RepaymentsOfLongTermDebt
Cash provided (used) by financing activities	582,386	(201,493)
Increase in cash and cash equivalents	1,669,040	755,580
Cash and cash equivalents at beginning of period	1,892,760	664,718
Cash and cash equivalents at end of period	$ 3,561,800	$ 1,420,298

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