Cover - USD ($)	12 Months Ended
Cover - USD ($)	May 31, 2022	Sep. 30, 2022	Nov. 30, 2021
Cover [Abstract]
Document Type	10-K/A
Amendment Flag	true
Amendment Description	to include information previously omitted in reliance on General Instruction G to Form 10-K, which provides that registrants may incorporate by reference certain information from a definitive proxy statement prepared in connection with the election of directors. The Company has determined to include such Part III information by amendment of the Original Filing rather than incorporation by reference to the proxy statement. Accordingly, Part III of the Original Filing is hereby amended and restated as set forth below. We are also filing as exhibits to this Amendment the certifications pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 and amending Item 15 of Part IV to include such certifications. Because no financial statements are contained in this Amendment, we are not including certifications pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
Document Annual Report	true
Document Transition Report	false
Document Period End Date	May 31, 2022
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2022
Current Fiscal Year End Date	--05-31
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
City Area Code	(503)
Local Phone Number	227-7908
Title of 12(b) Security	Common Stock, no par value
Trading Symbol	SMIT
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 17,796,026
Entity Common Stock, Shares Outstanding		3,872,134
Auditor Name	UHY LLP
Auditor Location	Melville, New York
Auditor Firm ID	1195

SCHMITT INDUSTRIES INC 10-K/A