XML 77 R63.htm IDEA: XBRL DOCUMENT v3.21.2

RELATED PARTY TRANSACTIONS (Schedule of Summarizes Assets and Liabilities) (Details) - USD ($)	12 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Apr. 30, 2020	Jul. 31, 2019
Operating Lease Right-Of-Use Assets	$ 34,566,169	$ 37,077,038	$ 37,698,819	$ 27,104,937
Operating Lease liabilities	$ 27,840,930	29,044,966	$ 29,326,365	$ 17,863,507
Expiration Date	Jul. 31, 2030
Jamaica Avenue at 169th Street [Member]
Operating Lease Right-Of-Use Assets	$ 12,842,642	13,190,809
Operating Lease liabilities	$ 4,959,450	5,084,505
Expiration Date	May 31, 2030
504-506 Fulton Street [Member]
Operating Lease Right-Of-Use Assets	$ 2,831,134	2,890,056
Operating Lease liabilities	$ 2,946,306	$ 3,008,181
Expiration Date	Apr. 30, 2031

X

- Definition

Date which lease or group of leases is set to expire, in YYYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_LeaseExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977

+ Details

Name:	us-gaap_OperatingLeaseLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of lessee's right to use underlying asset under operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977

+ Details

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

X

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=mays_JamaicaAvenueAt169thStreetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=mays_FiveHundredFour506FultonStreetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: