Note 5 - Product Warranties (Details) - Changes in Accrual for Product Warranties (USD $)	6 Months Ended
	Apr. 30, 2014	Apr. 30, 2013
Changes in Accrual for Product Warranties [Abstract]
Balance at beginning of period	$ 190,000	$ 250,000
Liabilities accrued for warranties issued during the period	212,255	241,455
Warranty claims and costs paid during the period	(134,535)	(131,640)
Changes in liability for pre-existing warranties during the period	(102,720)	(159,815)
Balance at end of period	$ 165,000	$ 200,000