Note 8 - Property, Plant and Equipment - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Property, plant and equipment, gross	$ 117,714	$ 115,728
Accumulated depreciation	(80,979)	(79,195)
Property, plant and equipment, net	36,735	36,533
Land [Member]
Property, plant and equipment, gross	122	348
Building and Building Improvements [Member]
Property, plant and equipment, gross	13,656	15,286
Machinery and Equipment [Member]
Property, plant and equipment, gross	100,933	98,527
Construction in Progress [Member]
Property, plant and equipment, gross	$ 3,003	$ 1,567