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,
	2012			2011
Beginning balance	$	423		$	624
Warranty provisions		35			19
Warranty claims		(24	)		(72	)
Adjustments to preexisting warranties		(32	)		—
Ending balance	$	402		$	571