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Note 8 - Property, Plant and Equipment - Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Property, plant and equipment, gross $ 358,522 $ 356,168
Less accumulated depreciation and amortization (183,003) (177,519)
Property, plant and equipment, net before construction in progress and land 175,519 178,649
Property, plant and equipment, net 207,171 210,184
Land Improvements [Member]    
Property, plant and equipment, gross 806 806
Building and Building Improvements [Member]    
Property, plant and equipment, gross 86,889 86,372
Machinery and Equipment [Member]    
Property, plant and equipment, gross 252,892 251,216
Furniture and Fixtures [Member]    
Property, plant and equipment, gross 5,434 5,382
Computer Equipment and Software [Member]    
Property, plant and equipment, gross 11,815 11,713
Vehicles [Member]    
Property, plant and equipment, gross 686 679
Construction in Progress [Member]    
Property, plant and equipment, net 30,551 30,434
Land [Member]    
Property, plant and equipment, net $ 1,101 $ 1,101