Note 19 - Segment Information (Details Textual) $ in Thousands		12 Months Ended
Sep. 12, 2018 Segment	Dec. 31, 2018 USD ($) Segment	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Number of manufacturing facilities	6	6
Number of reportable segments	2	2
Number of operating segments	5	5
Export Sales Included in Domestic Gross Sales \| $		$ 138,613	$ 195,193	$ 182,215
Customer Concentration Risk [Member] \| Gross Sales [Member]
Concentration Risk, Percentage		24.80%	35.10%	36.90%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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