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Note 5 - Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Property, plant and equipment, gross	$ 307,644	$ 306,696
Less accumulated depreciation	(203,406)	(202,403)
Property, plant and equipment, net	104,238	104,293
Land [Member]
Property, plant and equipment, gross	5,812	5,813
Building [Member]
Property, plant and equipment, gross	113,274	112,760
Machinery and Equipment [Member]
Property, plant and equipment, gross	$ 188,558	$ 188,123

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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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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