| Cover | Mar. 19, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Mar. 19, 2021 |
| Current Fiscal Year End Date | --12-31 |
| Entity File Number | 1-5005 |
| Entity Registrant Name | INTRICON CORPORATION |
| Entity Central Index Key | 0000088790 |
| Entity Tax Identification Number | 23-1069060 |
| Entity Incorporation State Country Code | PA |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock, par value $1.00 per share |
| Trading Symbol | IIN |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Information Former Legal Or Registered Name | N/A |
