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Note 5 - Property, Plant and Equipment - Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Oct. 31, 2021
Oct. 31, 2020
Property, plant and equipment, gross $ 67,295 $ 64,543
Less accumulated depreciation 48,559 46,358
Total 18,736 18,185
Land and Land Improvements [Member]    
Property, plant and equipment, gross 1,639 1,639
Building [Member]    
Property, plant and equipment, gross 9,497 9,497
Building Improvements [Member]    
Property, plant and equipment, gross 15,478 13,281
Furniture and Fixtures [Member]    
Property, plant and equipment, gross 4,214 4,363
Equipment, Including Capitalized Software [Member]    
Property, plant and equipment, gross $ 36,467 $ 35,763