Note 5 - Product Warranties (Details Textual) - USD ($)	3 Months Ended	9 Months Ended
Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014	Oct. 31, 2014	Oct. 31, 2013
Accounts Payable and Accrued Liabilities [Member]
Product Warranty Accrual	$ 195,000		$ 195,000		$ 100,000
Product Warranty Accrual	195,000	$ 135,000	195,000	$ 135,000	$ 100,000	$ 190,000
Product Warranty Expense	$ 73,228	$ 86,430	$ 229,643	$ 195,965

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 8

-Subparagraph ((c)(5))

-URI http://asc.fasb.org/extlink&oid=51674963&loc=d3e12565-110249

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.15(5))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Name:	us-gaap_ProductWarrantyAccrual
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant