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Note 1 - Summary of Significant Accounting Policies - Summary of Changes to Goodwill by Business Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Gross Balance		$ 37,572	$ 37,572
Accumulated Impairments		0	0
Balance	$ 37,572	37,572	37,572
Adjustments to Goodwill	0	0
Manufacturing [Member]
Gross Balance		18,270	18,270
Accumulated Impairments		0	0
Balance	18,270	18,270	18,270
Adjustments to Goodwill	0	0
Plastics [Member]
Gross Balance		19,302	19,302
Accumulated Impairments		0	0
Balance	19,302	19,302	$ 19,302
Adjustments to Goodwill	$ 0	$ 0

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
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- Definition

Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
-Paragraph 1
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+ References

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