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Cover - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Mar. 14, 2023
Jun. 30, 2022
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2022    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 000-52008    
Entity Registrant Name LUNA INNOVATIONS INC    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 54-1560050    
Entity Address, Address Line One 301 1st St SW    
Entity Address, Address Line Two Suite 200    
Entity Address, City or Town Roanoke    
Entity Address, State or Province VA    
Entity Address, Postal Zip Code 24011    
City Area Code 540    
Local Phone Number 769-8400    
Title of 12(b) Security Common Stock, $0.001 par value per share    
Trading Symbol LUNA    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status No    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 182.2
Entity Common Stock, Shares Outstanding   33,420,773  
Documents Incorporated by Reference DOCUMENTS INCORPORATED BY REFERENCESpecified portions of the registrant’s Proxy Statement with respect to its 2023 Annual Meeting of stockholders, anticipated to be filed within 120 days after the end of its fiscal year ended December 31, 2022, are incorporated by reference into Part III of this annual report on Form 10-K.    
Amendment Flag false    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001239819    
ICFR Auditor Attestation Flag false