DEFERRED CHARGES (Schedule of estimated aggregate amortization expense) (Details) (USD $)	Jul. 31, 2013
DEFERRED CHARGES [Abstract]
2014	$ 343,849
2015	311,455
2016	265,154
2017	195,756
2018	$ 153,328

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Amount of amortization expense expected to be recognized during the next fiscal year following the latest fiscal year for deferred charges.

No definition available.

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Amount of amortization expense expected to be recognized during the fifth fiscal year following the latest fiscal year for deferred charges.

No definition available.

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Amount of amortization expense expected to be recognized during the fourth fiscal year following the latest fiscal year for deferred charges.

No definition available.

Name:	mays_DeferredChargesAmortizationExpenseYearFour
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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

Amount of amortization expense expected to be recognized during the third fiscal year following the latest fiscal year for deferred charges.

No definition available.

Name:	mays_DeferredChargesAmortizationExpenseYearThree
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Amount of amortization expense expected to be recognized during the second fiscal year following the latest fiscal year for deferred charges.

No definition available.

Name:	mays_DeferredChargesAmortizationExpenseYearTwo
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant