v3.5.0.2
Document and Entity Information - shares
3 Months Ended
Sep. 30, 2016
Oct. 27, 2016
Document and Entity Information    
Entity Registrant Name OSI SYSTEMS INC  
Entity Central Index Key 0001039065  
Document Type 10-Q  
Document Period End Date Sep. 30, 2016  
Amendment Flag false  
Current Fiscal Year End Date --06-30  
Entity Current Reporting Status Yes  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   19,064,008
Document Fiscal Year Focus 2017  
Document Fiscal Period Focus Q1