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Note 11 - Income Taxes - Unrecognized Benefits (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 31, 2020
Oct. 31, 2019
Unrecognized tax benefit—November 1, $ 0.9 $ 1.2
Gross increases—tax positions in current period 0.0 0.0
Lapse of statute of limitations (0.2) (0.3)
Unrecognized tax benefit—October 31, $ 0.7 $ 0.9