Document and Entity Information Document - USD ($)
3 Months Ended
Sep. 30, 2017
Oct. 23, 2017
Dec. 31, 2016
Document and Entity Information [Abstract]      
Entity Registrant Name KOSS CORP    
Entity Central Index Key 0000056701    
Current Fiscal Year End Date --06-30    
Entity Filer Category Smaller Reporting Company    
Document Type 10-Q    
Document Period End Date Sep. 30, 2017    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus Q1    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   7,382,706  
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 5,950,766