Document And Entity Information - shares	9 Months Ended
	May 31, 2019	Jun. 30, 2019
Document And Entity Information [Abstract]
Entity Registrant Name	PRICESMART INC
Entity Central Index Key	0001041803
Current Fiscal Year End Date	--08-31
Title of 12(b) Security	Common Stock, $0.0001 par value
Trading Symbol	psmt
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Document Type	10-Q
Amendment Flag	false
Document Period End Date	May 31, 2019
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		30,539,308