Note 15 - Goodwill (Details Textual) - USD ($)	3 Months Ended
Mar. 31, 2019	Dec. 31, 2021	Dec. 31, 2020
Goodwill, Ending Balance		$ 0	$ 0
Clever Container Company, L.L.C. [Member]
Goodwill, Impairment Loss	$ 220,000
Flexo Universal [Member]
Goodwill, Impairment Loss	$ 1,033,000

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Name:	us-gaap_GoodwillImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration