Name:	MAYS_DisclosureOperatingLeasesAbstract
Namespace Prefix:	MAYS_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The amount of non-lease components Company owned property.

No definition available.

Name:	MAYS_Non-LeaseComponentsCompanyOwnedProperty
Namespace Prefix:	MAYS_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of non-lease components leased property.

No definition available.

Name:	MAYS_NonLeaseComponentsLeasedProperty
Namespace Prefix:	MAYS_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of operating lease base lease rent fixed.

No definition available.

Name:	MAYS_OperatingLeaseBaseLeaseRentFixed
Namespace Prefix:	MAYS_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of operating lease reimbursements of common area costs.

No definition available.

Name:	MAYS_OperatingLeaseReimbursementsOfCommonAreaCosts
Namespace Prefix:	MAYS_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The amount contract or instrument conveying property to another for a specified period or for a period determinable at the will of either lessor or lessee in consideration of rent or other compensation.

No definition available.

Name:	MAYS_PropertyPlantAndEquipmenLeased
Namespace Prefix:	MAYS_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Reimbursements of Common Area Costs and Non-lease Components [Abstract]

No definition available.

Name:	MAYS_ReimbursementsOfCommonAreaCostsAndNonLeaseComponentsAbstract
Namespace Prefix:	MAYS_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount of operating lease income from variable lease payments paid and payable to lessor, excluding amount included in measurement of lease receivable.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479773/842-30-50-5

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 270
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482964/270-10-50-6A

Name:	us-gaap_OperatingLeaseVariableLeaseIncome
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount, before accumulated depreciation, of long-lived, depreciable flight asset owned. Excludes right-of-use asset from finance lease for flight asset.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482099/360-10-50-1

Name:	us-gaap_PropertyPlantAndEquipmentOwnedGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount, after accumulated depreciation, of long-lived, depreciable flight asset owned. Excludes right-of-use asset from finance lease for flight asset.

Name:	us-gaap_PropertyPlantAndEquipmentOwnedNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Income earned by providing the use of assets to an outside party in exchange for a payment or series of payments that is nonoperating in nature.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(7))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2