Note 22 - Subsequent Events (Details Textual)	Feb. 28, 2022 $ / shares
Subsequent Event [Member] \| Altaris Capital Partners, LLC [Member] \| Intricon Corporation [Member]
Business Acquisition, Share Price (in dollars per share)	$ 24.25

Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

No definition available.

Name:	us-gaap_BusinessAcquisitionSharePrice
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant