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DEFERRED CHARGES (Schedule of Estimated Aggregate Amortization Expense) (Details) | Jul. 31, 2021 USD ($)
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Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |
2022 | $ 427,013
2023 | 425,017
2024 | 394,396
2025 | 352,943
2026 | $ 333,292

X
- Definition Amount of amortization expense expected to be recognized during the next fiscal year following the latest fiscal year for deferred charges. + References No definition available. + Details
Name: | mays_DeferredChargesAmortizationExpenseNextTwelveMonths
Namespace Prefix: | mays_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of amortization expense expected to be recognized during the fifth fiscal year following the latest fiscal year for deferred charges. + References No definition available. + Details
Name: | mays_DeferredChargesAmortizationExpenseYearFive
Namespace Prefix: | mays_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of amortization expense expected to be recognized during the fourth fiscal year following the latest fiscal year for deferred charges. + References No definition available. + Details
Name: | mays_DeferredChargesAmortizationExpenseYearFour
Namespace Prefix: | mays_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of amortization expense expected to be recognized during the third fiscal year following the latest fiscal year for deferred charges. + References No definition available. + Details
Name: | mays_DeferredChargesAmortizationExpenseYearThree
Namespace Prefix: | mays_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of amortization expense expected to be recognized during the second fiscal year following the latest fiscal year for deferred charges. + References No definition available. + Details
Name: | mays_DeferredChargesAmortizationExpenseYearTwo
Namespace Prefix: | mays_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration