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Note 5 - Property, Plant and Equipment - Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Oct. 31, 2019
Oct. 31, 2018
Property, plant and equipment, gross $ 62,107 $ 60,072
Less accumulated depreciation 41,980 39,787
Total 20,127 20,285
Land and Land Improvements [Member]    
Property, plant and equipment, gross 1,639 1,639
Building [Member]    
Property, plant and equipment, gross 9,155 9,155
Building Improvements [Member]    
Property, plant and equipment, gross 11,552 10,958
Furniture and Fixtures [Member]    
Property, plant and equipment, gross 4,338 5,305
Equipment, Including Capitalized Software [Member]    
Property, plant and equipment, gross $ 35,423 $ 33,015