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Note 8 - Property, Plant and Equipment - Property, Plant and Equipment Components (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Gross property, plant and equipment $ 76,172 $ 69,814
Finance lease, right-of-use asset, gross 6,477 5,912
Finance lease, right-of-use, accumulated depreciation (2,712) (1,896)
Accumulated depreciation (60,640) (55,674)
Property plant and equipment, net 15,532 14,140
Property, Plant and Equipment [Member]    
Finance lease, right-of-use, net 3,765 4,016
Land and Land Improvements [Member]    
Gross property, plant and equipment 43 43
Building and Building Improvements [Member]    
Gross property, plant and equipment 8,044 7,863
Finance lease, right-of-use asset, gross 3,045 2,864
Machinery, Equipment, Furniture, and Fixtures [Member]    
Finance lease, right-of-use asset, gross 3,432 3,048
Property, Plant and Equipment, Other Types [Member]    
Gross property, plant and equipment 66,037 61,050
Construction in Progress [Member]    
Gross property, plant and equipment $ 2,048 $ 858