Note 12 - Per Share Calculations (Details Textual) - shares shares in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Non Vested Stock and Outstanding Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0.1	0.1	0.1	0.1
Convertible Debt Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount				0.1
Out of the Money Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0.3	0.2	0.3	0.2