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Note 5 - Property, Plant and Equipment (Details Textual) - USD ($)
$ in Thousands
Oct. 31, 2017
Oct. 31, 2016
Property, Plant and Equipment, Net $ 52,919 $ 50,332
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment 69,342 $ 69,715
Corporate Headquarters Building [Member]    
Property, Plant and Equipment, Net 34,700  
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment 26,400  
Land [Member] | Corporate Headquarters Building [Member]    
Property, Plant and Equipment, Net 1,000  
Building [Member] | Corporate Headquarters Building [Member]    
Property, Plant and Equipment, Net $ 60,100