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Note 10 - Income Taxes (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Jul. 31, 2020
Jul. 31, 2019
Jul. 31, 2020
Jul. 31, 2019
Oct. 31, 2019
Effective Income Tax Rate Reconciliation, Percent, Total 63.00% 21.00% 38.00% 22.00%  
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total $ 101,000   $ 101,000   $ 80,000
Unrecognized Tax Benefits, Ending Balance $ 26,000   $ 26,000