Note 8 - Property, Plant and Equipment - Property, Plant and Equipment Components (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Gross property, plant and equipment	$ 84,001	$ 76,172
Finance lease, right-of-use asset, gross	7,536	6,477
Finance lease, right-of-use, accumulated depreciation	(3,799)	(2,712)
Accumulated depreciation	(66,868)	(60,640)
Property plant and equipment, net	17,133	15,532
Property, Plant and Equipment [Member]
Finance lease, right-of-use, net	3,737	3,765
Land and Land Improvements [Member]
Gross property, plant and equipment	43	43
Building and Building Improvements [Member]
Gross property, plant and equipment	8,507	8,044
Finance lease, right-of-use asset, gross	3,490	3,045
Machinery, Equipment, Furniture, and Fixtures [Member]
Finance lease, right-of-use asset, gross	4,046	3,432
Property, Plant and Equipment, Other Types [Member]
Gross property, plant and equipment	74,588	66,037
Construction in Progress [Member]
Gross property, plant and equipment	$ 863	$ 2,048

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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