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Note 4 - Supplemental Balance Sheet Information - Components of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Property, plant and equipment, gross	$ 86,990	$ 87,601
Less: Accumulated depreciation	(66,320)	(66,484)
Property, plant and equipment, net	20,670	21,117
Land [Member]
Property, plant and equipment, gross	1,273	1,273
Building and Building Improvements [Member]
Property, plant and equipment, gross	16,007	15,998
Machinery and Equipment [Member]
Property, plant and equipment, gross	57,427	57,584
Furniture and Fixtures [Member]
Property, plant and equipment, gross	2,818	2,845
Computer Equipment [Member]
Property, plant and equipment, gross	7,770	7,868
Construction in Progress [Member]
Property, plant and equipment, gross	$ 1,695	$ 2,033

X

- Definition

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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