Note 12 - Per Share Calculation (Details Textual) - shares shares in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Exchangeable Note Unit Rate Stated Percentage	6.00%		6.00%
Non Vested Stock and Outstanding Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	2.8	4.3	3.0	3.4
Convertible Debt Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		10.0	1.1	10.1
Out of the Money Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	6.4	4.5	5.3	4.6