v3.26.1
Document And Entity Information - USD ($)
 12 Months Ended
Jun. 30, 2026
Sep. 08, 2026
Dec. 31, 2025
Document Information [Line Items]      
Entity Central Index Key 0000889971    
Entity Registrant Name LIGHTPATH TECHNOLOGIES INC    
Amendment Flag false    
Current Fiscal Year End Date --06-30    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2026    
Document Type 10-K    
Document Annual Report true    
Document Period End Date Jun. 30, 2026    
Document Transition Report false    
Entity File Number 000-27548    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 86-0708398    
Entity Address, Address Line One 2603 Challenger Tech Court, Suite 100    
Entity Address, City or Town Orlando    
Entity Address, State or Province FL    
Entity Address, Postal Zip Code 32826    
City Area Code 407    
Local Phone Number 382-4003    
Title of 12(b) Security Class A Common Stock, par value $0.01    
Trading Symbol LPTH    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 580,100,000
Entity Common Stock, Shares Outstanding   70,036,252  
Auditor Name BDO USA, P.C.    
Auditor Firm ID 243    
Auditor Location Troy, MI