Note 5 - Property, Plant and Equipment, Net - Summary of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, plant and equipment, gross	$ 118,013	$ 122,565
Accumulated depreciation	(71,123)	(71,173)
Property, plant and equipment, net	46,890	51,392
Land [Member]
Property, plant and equipment, gross	2,494	2,494
Buildings Improvements and Leaseholds [Member]
Property, plant and equipment, gross	16,929	18,652
Machinery, Equipment and Fixtures [Member]
Property, plant and equipment, gross	$ 98,590	$ 101,419