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Document And Entity Information (USD $)
12 Months Ended
Aug. 31, 2011
Nov. 01, 2011
Feb. 28, 2011
Entity Registrant Name PRICESMART INC    
Entity Central Index Key 0001041803    
Current Fiscal Year End Date --08-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Accelerated Filer    
Document Fiscal Year Focus 2011    
Document Fiscal Period Focus FY    
Document Type 10-K    
Amendment Flag true    
Document Period End Date Aug. 31, 2011    
Entity Common Stock Shares Outstanding   29,900,030  
Entity Public Float     $ 375,639,815
Amendment Description Total reported for comprehensive income had a typographical error and has been corrected to read $55,507 from $59,744.