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Note 8 - Property, Plant and Equipment - Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Property, Plant and Equipment, Gross $ 19,716 $ 23,336
Less: accumulated depreciation (14,940) (17,438)
Property, plant and equipment, net 4,776 5,898
Machinery and Equipment [Member]    
Property, Plant and Equipment, Gross 7,198 9,678
Computer Equipment and Software [member]    
Property, Plant and Equipment, Gross 8,954 9,685
Leasehold Improvements [Member]    
Property, Plant and Equipment, Gross 2,151 2,468
Furniture and Fixtures [Member]    
Property, Plant and Equipment, Gross 1,321 1,390
Automobiles [Member]    
Property, Plant and Equipment, Gross $ 92 $ 115