Note 2 - Summary of Significant Accounting Policies (Details Textual)		3 Months Ended												12 Months Ended
		Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Sep. 30, 2013 USD ($)	Jun. 30, 2013 USD ($)	Mar. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Sep. 30, 2015 USD ($)		Sep. 30, 2014 USD ($)		Sep. 30, 2013 USD ($)	Sep. 30, 2012 USD ($)
Accounts Receivable [Member] | Automotive Industry [Member]
Concentration Risk, Percentage														80.00%		87.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Accounts Receivable, Net		$ 741,000				$ 731,000								$ 741,000		$ 731,000
Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member]
Number of Customers														1
Revenue, Net														$ 2,158,000		2,768,000		$ 2,304,000
Minimum [Member]
Warranty Period														1 year
Maximum [Member]
Warranty Period														4 years
Inventory Valuation Reserve [Member]
Valuation Allowances and Reserves, Deductions	[1]													$ 64,955		315,897		118,107
Valuation Allowances and Reserves, Charged to Cost and Expense														(47,045)	[2]	(113,603)	[2]	60,107
Revenue, Net		1,794,910	$ 1,804,614	$ 1,091,182	$ 1,162,218	2,008,715	$ 2,130,412	$ 1,116,467	$ 1,050,242	$ 1,423,000	$ 1,339,931	$ 1,964,338	$ 1,738,903	$ 5,852,924		6,305,836		6,466,172
Percentage of Research and Development to Sales														1.00%
Cash and Cash Equivalents, at Carrying Value		346,405				390,327				$ 938,852				$ 346,405		390,327		$ 938,852	$ 258,798
Inventory Valuation Reserves		$ 251,500				$ 363,500								251,500		363,500
Valuation Allowances and Reserves, Deductions
Depreciation														68,686		62,195		$ 64,186
Advertising Expense														$ 22,764		$ 9,017		$ 6,558

[1] Inventory charged off during the year as obsolete.

[2] Reduction in inventory obsolescence reserve.