Note 2 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Sep. 30, 2012

Schedule of Product Warranty Liability [Table Text Block]

	2012			2011			2010
Balance October 1	$	993		$	3,415		$	4,482
Current year provisions		7,564			163			3,602
Expenditures		(8,106	)		(2,585	)		(4,669	)
Balance September 30	$	451		$	993		$	3,415

Schedule of Inventory, Current [Table Text Block]

	2012		2011
Raw materials and component parts	$	1,061,957	$	1,145,278
Work-in-process		451,733		515,885
Finished products		221,080		302,780
	$	1,734,770	$	1,963,943

Property, Plant and Equipment, Estimated Useful Lives

Class	Method	Estimated Useful Lives (in years)
Buildings	Straight-line	10	to	40
Machinery and equipment	Straight-line	3	to	10
Tools and dies	Straight-line	3