| Cover | Apr. 14, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Apr. 14, 2022 |
| Entity File Number | 001-38964 |
| Entity Registrant Name | SCHMITT INDUSTRIES, INC. |
| Entity Central Index Key | 0000922612 |
| Entity Tax Identification Number | 93-1151989 |
| Entity Incorporation, State or Country Code | OR |
| Entity Address, Address Line One | 2765 N.W. Nicolai Street |
| Entity Address, City or Town | Portland |
| Entity Address, State or Province | OR |
| Entity Address, Postal Zip Code | 97210-1818 |
| City Area Code | (503) |
| Local Phone Number | 227-7908 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock – no par value |
| Trading Symbol | SMIT |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Information, Former Legal or Registered Name | Not Applicable |
