Note 1 - Nature of Operations and Summary of Significant Accounting Policies - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Land	$ 1,306	$ 1,306
Buildings and leasehold improvements	28,954	28,207
Machinery and equipment	27,616	29,194
Total cost	57,876	58,707
Accumulated depreciation and amortization	(35,655)	(34,921)
Property, Plant and Equipment, Net	$ 22,221	$ 23,786

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 of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing.

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