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Long-Term Debt - Mortgages (Schedule of long-term debt) (Details) (USD $) | 9 Months Ended |  |
--- | --- | --- | ---
Apr. 30, 2015 | Jan. 09, 2015 | Jul. 31, 2014
Due Within One Year | $ 149,422mays_LongTermDebtWithinOneYear |  | $ 240,000mays_LongTermDebtWithinOneYear
Due After One Year | 5,825,014mays_LongTermDebtWithinAfterYear |  | 5,181,335mays_LongTermDebtWithinAfterYear
Fishkill, New York Property [Member] |  |  |
Due Within One Year |  |  | 68,112mays_LongTermDebtWithinOneYear / mays_MortgagesPropertyAxis = mays_FishkillNewYorkPropertyMember
Due After One Year |  |  | 1,470,463mays_LongTermDebtWithinAfterYear / mays_MortgagesPropertyAxis = mays_FishkillNewYorkPropertyMember
Current Annual Interest Rate | 6.98%us-gaap_DebtInstrumentInterestRateEffectivePercentage / mays_MortgagesPropertyAxis = mays_FishkillNewYorkPropertyMember |  |
Final Payment Date | Feb. 18, 2015 |  |
Bond St. Building, Brooklyn, N Y [Member] |  |  |
Due Within One Year |  |  | 171,888mays_LongTermDebtWithinOneYear / mays_MortgagesPropertyAxis = mays_BondSt.BuildingBrooklynNYMember
Due After One Year |  |  | 3,710,872mays_LongTermDebtWithinAfterYear / mays_MortgagesPropertyAxis = mays_BondSt.BuildingBrooklynNYMember
Current Annual Interest Rate | 6.98%us-gaap_DebtInstrumentInterestRateEffectivePercentage / mays_MortgagesPropertyAxis = mays_BondSt.BuildingBrooklynNYMember |  |
Final Payment Date | Feb. 18, 2015 |  |
Bond St. building, Brooklyn, NY [Member] |  |  |
Due Within One Year | 149,422mays_LongTermDebtWithinOneYear / mays_MortgagesPropertyAxis = mays_BondSt.BuildingBrooklynNYTwoMember |  |
Due After One Year | $ 5,825,014mays_LongTermDebtWithinAfterYear / mays_MortgagesPropertyAxis = mays_BondSt.BuildingBrooklynNYTwoMember |  |
Current Annual Interest Rate | 3.54%us-gaap_DebtInstrumentInterestRateEffectivePercentage / mays_MortgagesPropertyAxis = mays_BondSt.BuildingBrooklynNYTwoMember | 3.54%us-gaap_DebtInstrumentInterestRateEffectivePercentage / mays_MortgagesPropertyAxis = mays_BondSt.BuildingBrooklynNYTwoMember |
Final Payment Date | Feb. 01, 2020 |  |

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- Definition Amount of long term debt due after year. + References No definition available. + Details
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- Definition Amount of long term debt due within one year. + References No definition available. + Details
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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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