Document and Entity Information - shares	3 Months Ended
	Aug. 31, 2018	Sep. 30, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	TSR INC
Entity Central Index Key	0000098338
Trading Symbol	TSRI
Amendment Flag	false
Current Fiscal Year End Date	--05-31
Document Type	10-Q
Document Period End Date	Aug. 31, 2018
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2019
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		1,962,062