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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Mar. 29, 2022
Jun. 30, 2021
Document and Entity Information        
Document Type 10-K      
Document Annual Report true      
Document Period End Date Dec. 31, 2021      
Document Transition Report false      
Entity File Number 001-37659      
Entity Registrant Name INTERLINK ELECTRONICS, INC      
Entity Incorporation, State or Country Code NV      
Entity Tax Identification Number 77-0056625      
Entity Address, Address Line One 1 Jenner, Suite 200      
Entity Address, City or Town Irvine      
Entity Address, State or Province CA      
Entity Address, Postal Zip Code 92618      
City Area Code 805      
Local Phone Number 484-8855      
Title of 12(g) Security Common stock, $0.001 par value per share      
Trading Symbol LINK      
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      
Entity Shell Company false      
Entity Common Stock, Shares Outstanding     6,602,498  
Entity Central Index Key 0000828146      
Current Fiscal Year End Date --12-31      
Document Fiscal Year Focus 2021      
Document Fiscal Period Focus FY      
Amendment Flag false      
Entity Public Float       $ 9,229,412
Auditor Name Macias Gini & O’Connell LLP RBSM LLP    
Auditor Firm ID 324 587    
Auditor Location Irvine, CA Larkspur, CA