Note 16 - Subsequent Event (Details Textual) - molded fiber business (“MFT”) and related real estate in Iowa [Member] - Discontinued Operations, Disposed of by Sale [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Jul. 26, 2022
Disposal Group, Including Discontinued Operation, Revenue	$ 21.3
Subsequent Event [Member]
Disposal Group, Including Discontinued Operation, Consideration		$ 32.0