Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2021	Apr. 30, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
Document Transition Report	false
Entity File Number	1-5005
Entity Registrant Name	INTRICON CORPORATION
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	23-1069060
Entity Address, Address Line One	1260 Red Fox Road
Entity Address, City or Town	Arden Hills
Entity Address, State or Province	MN
Entity Address, Postal Zip Code	55112
City Area Code	651
Local Phone Number	636-9770
Title of 12(b) Security	Common stock, par value $1.00 per share
Trading Symbol	IIN
Security Exchange Name	NASDAQ
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		9,072,253
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Interactive Data Current	Yes
Entity Central Index Key	0000088790