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Note 4 - Property & Equipment - Property & Equipment (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Property and equipment, gross $ 53,807 $ 52,274
Less accumulated depreciation (36,746) (36,215)
Property and equipment, net 17,061 16,059
Land [Member]    
Property and equipment, gross 5,052 5,052
Land Improvements [Member]    
Property and equipment, gross 13,861 13,853
Building [Member]    
Property and equipment, gross 23,105 22,869
Machinery and Equipment [Member]    
Property and equipment, gross 10,960 10,500
Construction in Progress [Member]    
Property and equipment, gross $ 829 $ 0