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Note 5 - Balance Sheet Information - Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Property, Plant and Equipment, Gross $ 18,212 $ 17,864
Less: accumulated depreciation (14,846) (14,449)
Property, plant and equipment, net 3,366 3,415
Machinery and Equipment [Member]    
Property, Plant and Equipment, Gross 7,500 7,698
Computer Equipment and Software [member]    
Property, Plant and Equipment, Gross 6,781 6,269
Leasehold Improvements [Member]    
Property, Plant and Equipment, Gross 2,507 2,560
Furniture and Fixtures [Member]    
Property, Plant and Equipment, Gross 1,386 1,296
Automobiles [Member]    
Property, Plant and Equipment, Gross $ 38 $ 41