DOCUMENT AND ENTITY INFORMATION - shares |
9 Months Ended | |
|---|---|---|
Apr. 30, 2018 |
Jun. 07, 2018 |
|
| Document And Entity Information [Abstract] | ||
| Entity Registrant Name | MAYS J W INC | |
| Entity Central Index Key | 0000054187 | |
| Current Fiscal Year End Date | --07-31 | |
| Entity Filer Category | Smaller Reporting Company | |
| Trading Symbol | mays | |
| Entity Common Stock, Shares Outstanding | 2,015,780 | |
| Document Type | 10-Q | |
| Amendment Flag | false | |
| Document Period End Date | Apr. 30, 2018 | |
| Document Fiscal Period Focus | Q3 | |
| Document Fiscal Year Focus | 2018 |