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Note 20 - Transactions With Related Parties (Details Textual) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jul. 31, 2018
Jul. 31, 2017
Jul. 31, 2018
Jul. 31, 2017
Tavit Najarian [Member]        
Related Party Transaction, Amounts of Transaction $ 0.2 $ 0.2 $ 0.5 $ 0.6