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Note 13 - Per Share Calculation (Details Textual) - shares
shares in Thousands
3 Months Ended 9 Months Ended
Jul. 31, 2021
Jul. 31, 2020
Jul. 31, 2021
Jul. 31, 2020
Out of the Money Stock Options [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 25 200 25 200