Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2021	Nov. 04, 2021
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 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 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	Q3
Amendment Flag	false