Document and Entity Information - shares	3 Months Ended
	Aug. 31, 2020	Oct. 30, 2020
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Aug. 31, 2020
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2021
Current Fiscal Year End Date	--05-31
Entity File Number	001-38964
Entity Registrant Name	SCHMITT INDUSTRIES INC
Entity Central Index Key	0000922612
Entity Incorporation, State or Country Code	OR
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 Common Stock, Shares Outstanding		3,758,484