Note 5 - Product Warranties (Details) - Changes in Accrual for Product Warranties (USD $)	9 Months Ended
	Jul. 31, 2014	Jul. 31, 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	299,477	319,638
Warranty claims and costs paid during the period	(250,965)	(211,725)
Changes in liability for pre-existing warranties during the period	(103,512)	(157,913)
Balance at end of period	$ 135,000	$ 200,000