Note A - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Product Warranty Liability [Table Text Block]

	2012			2011			2010
Balance at beginning of year	$	1,228		$	1,543		$	1,863
Provision		1,394			1,081			1,217
Claims		(1,489	)		(1,396	)		(1,537	)
Balance at end of year	$	1,133		$	1,228		$	1,543