Document and Entity Information - shares	6 Months Ended
	Nov. 30, 2017	Dec. 31, 2017
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	Nov. 30, 2017
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2018
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		1,962,062