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Note 4 - Property and Equipment, Net - Schedule of Property and Equipment (Details) - USD ($)
Oct. 31, 2018
Oct. 31, 2017
Property and equipment, gross $ 39,834,237 $ 39,753,617
Less accumulated amortization and depreciation (28,629,598) (27,542,925)
Property and equipment, net 11,204,639 12,210,692
Land [Member]    
Property and equipment, gross 3,148,834 3,148,834
Building and Building Improvements [Member]    
Property and equipment, gross 8,244,384 8,165,637
Machinery and Equipment [Member]    
Property and equipment, gross 27,312,627 25,817,318
Furniture and Fixtures [Member]    
Property and equipment, gross 902,633 894,237
Construction in Progress [Member]    
Property and equipment, gross $ 225,759 $ 1,727,591