Note 9—Warranties

We maintain a reserve for potential warranty claims related to products sold and recognized in revenue. We regularly reassess the adequacy of our estimates and adjust the amounts as necessary. Our warranty reserve is included in other accrued expenses.

The activity in our warranty liability was as follows:


	Three months ended September 30,						Nine months ended September 30,
	2013			2012			2013			2012
Balance, beginning of period	$	34		$	88		$	45			36
Provision for claims		58			12			124			110
Product or cash issued to settle claims		(22	)		(71	)		(99	)		(117	)

Balance, end of period	$	70		$	29		$	70		$	29

At September 30, 2013, deferred revenue from extended warranties was $93.