8. GUARANTEES

Certain of the Company’s products carry a one-year warranty, the costs of which are accrued for at the time of shipment or delivery. Accrual rates are based upon historical experience for the trailing twelve months and management’s judgment of future exposure. Warranty experience for the three months ended June 30, 2013 and 2012 was as follows:

	Three Months Ended
(In thousands)	June 30, 2013			June 30, 2012
Warranty accrual at beginning of period	$	397		$	358
Accruals for warranties issued during the period	105			123
Adjustment of preexisting accrual estimates	(15		)	96
Warranty costs incurred during period	(123		)	(220		)
Warranty accrual at end of period	$	364		$	357