Note 5 - On-balance Sheet Derivative Instruments and Hedging Activities - Adjustments to Other Comprehensive Income (Loss) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Reclassification adjustment for loss in income, before tax	$ 1,469	$ 10,673	$ 12,669	$ 23,588
Reclassification adjustment for loss in income, tax	(588)	(4,269)	(5,067)	(9,435)
Reclassification adjustment for loss in income, net of tax	881	6,404	7,602	14,153
Net unrealized gain (loss), before tax	1,654	1,154	34,508	(40,873)
Net unrealized gain (loss), tax	(662)	(462)	(13,803)	16,349
Net unrealized gain (loss), net of tax	992	692	20,705	(24,524)
Gains (loss) on interest rate swap, before tax	185	(9,519)	21,839	(64,461)
Gains (loss) on interest rate swap, tax	(74)	3,807	(8,736)	25,784
Gains (loss) on interest rate swap, net of tax	$ 111	$ (5,712)	$ 13,103	$ (38,677)