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Note 12 - Per Share Calculation (Details Textual) - shares
shares in Thousands
3 Months Ended 6 Months Ended
Apr. 30, 2017
Apr. 30, 2016
Apr. 30, 2017
Apr. 30, 2016
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 0 0 0 0
Convertible Debt Securities [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 10,000 15,200 10,100 15,200
Out of the Money Stock Options [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 4,700 6,400 4,700 6,400