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Note 5 - Property, Plant and Equipment - Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Oct. 31, 2020
Oct. 31, 2019
Property, plant and equipment, gross $ 64,543 $ 62,107
Less accumulated depreciation 46,358 41,980
Total 18,185 20,127
Land and Land Improvements [Member]    
Property, plant and equipment, gross 1,639 1,639
Building [Member]    
Property, plant and equipment, gross 9,497 9,155
Building Improvements [Member]    
Property, plant and equipment, gross 13,281 11,552
Furniture and Fixtures [Member]    
Property, plant and equipment, gross 4,363 4,338
Equipment, Including Capitalized Software [Member]    
Property, plant and equipment, gross $ 35,763 $ 35,423