Document And Entity Information - shares
 9 Months Ended
May 31, 2021
Jun. 30, 2021
Document And Entity Information [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date May 31, 2021  
Document Transition Report false  
Entity File Number 0-22793  
Entity Registrant Name PriceSmart, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 33-0628530  
Entity Address, Address Line One 9740 Scranton Road  
Entity Address, City or Town San Diego  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 92121  
City Area Code 858  
Local Phone Number 404-8800  
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 2021  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   30,783,266