Discontinued Operations (Narrative) (Details) $ in Thousands	9 Months Ended
Sep. 30, 2019 USD ($)
Discontinued Operations, Disposed of by Sale [Member]
Disposal loss after write-down of assets	$ 1,004

Disposal Group, Including Discontinued Operation, Assets (Liabilities) Of Disposal Group

No definition available.

Name:	iin_DisposalGroupIncludingDiscontinuedOperationAssetsLiabilitiesOfDisposalGroup
Namespace Prefix:	iin_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration