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Document and Entity Information - USD ($)
 12 Months Ended
Jun. 30, 2015
Sep. 14, 2015
Dec. 31, 2014
Document And Entity Information      
Entity Registrant Name LightPath Technologies Inc    
Entity Central Index Key 0000889971    
Document Type 10-K    
Document Period End Date Jun. 30, 2015    
Amendment Flag false    
Current Fiscal Year End Date --06-30    
Is Entity a Well-known Seasoned Issuer? No    
Is Entity a Voluntary Filer? No    
Is Entity's Reporting Status Current? Yes    
Entity Filer Category Smaller Reporting Company    
Entity Common Stock, Shares Outstanding   15,239,775  
Entity Public Float     $ 8,645,439
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2015