Note F: Warranties

We generally provide a standard two-year warranty on product sales. Reserves to honor warranty claims are estimated and recorded at the time of sale based on historical claim information and are analyzed and adjusted periodically based on claim trends.

Warranty liability and related activity consisted of the following (in thousands):


	Three-Month Periods Ended March 31,
	2013			2012
Beginning balance	$	520		$	423
Warranty provisions		48			35
Warranty claims		(137	)		(24	)
Adjustments to preexisting warranties		(12	)		(32	)
Ending balance	$	419		$	402