DEFERRED CHARGES (Schedule of deferred charges) (Details) (USD $)	12 Months Ended
Jul. 31, 2013	Jul. 31, 2012
Gross Carrying Amount	$ 3,806,743	$ 3,594,846
Accumulated Amortization	1,920,661	1,888,642
Leasing Brokerage Commissions [Member]
Gross Carrying Amount	2,708,480	2,486,928
Accumulated Amortization	1,051,598	1,060,337
Professional Fees For Leasing [Member]
Gross Carrying Amount	337,592	313,183
Accumulated Amortization	164,945	138,161
Financing Costs [Member]
Gross Carrying Amount	760,671	760,671
Accumulated Amortization	704,118	667,436
Other Deferred Charges [Member]
Gross Carrying Amount		34,064
Accumulated Amortization		$ 22,708

This element represents costs incurred by the lessor for the current period, that are (a) costs to originate a lease incurred in transactions with independent third parties that (i) result directly from and are essential to acquire that lease and (ii) would not have been incurred had that leasing transaction not occurred and (b) certain costs directly related to specified activities performed by the lessor for that lease. Those activities are: evaluating the prospective lessee's financial condition; evaluating and recording guarantees, collateral, and other security arrangements; negotiating lease terms; preparing and processing lease documents; and closing the transaction. This amount is before considering accumulated amortization representing the periodic charge to earnings to recognize the deferred costs over the term of the related lease.

No definition available.

Name:	mays_DeferredChargesGross
Namespace Prefix:	mays_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant