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Note 4 - Supplemental Balance Sheet Information - Components of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Property, plant and equipment, gross	$ 93,322		$ 93,322		$ 92,660
Depreciation	760	$ 819	1,522	$ 1,635
Less: Accumulated depreciation	(72,200)		(72,200)		(70,944)
Property, plant and equipment, net	21,122		21,122		21,716
Land [Member]
Property, plant and equipment, gross	1,273		1,273		1,273
Building and Building Improvements [Member]
Property, plant and equipment, gross	15,569		15,569		15,572
Machinery and Equipment [Member]
Property, plant and equipment, gross	64,044		64,044		63,981
Furniture and Fixtures [Member]
Property, plant and equipment, gross	2,791		2,791		2,845
Computer Equipment [Member]
Property, plant and equipment, gross	7,798		7,798		7,744
Construction in Progress [Member]
Property, plant and equipment, gross	$ 1,847		$ 1,847		$ 1,245

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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