v2.4.0.6
Document and Entity Information (USD $)
12 Months Ended
Jun. 30, 2013
Aug. 15, 2013
Dec. 31, 2012
Document and Entity Information      
Entity Registrant Name OSI SYSTEMS INC    
Entity Central Index Key 0001039065    
Document Type 10-K    
Document Period End Date Jun. 30, 2013    
Amendment Flag false    
Current Fiscal Year End Date --06-30    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 1,236,352,590
Entity Common Stock, Shares Outstanding   19,979,678  
Document Fiscal Year Focus 2013    
Document Fiscal Period Focus FY