		Fiscal Year Ended December 31,													Three Months ended March 31,

		2006			2007		2008			2009			2010		2011
		(dollars in thousands)
Ratio of earnings to fixed charges
Earnings:
	Income/(Loss) before income taxes	($	3,680	)	$	5,297	($	38	)	($	1,596	)	$	20,184	$	6,465
Add:
	Fixed charges		426			339		231			64			74		5

Total income/(loss) for computation of ratio		($	3,254	)	$	5,636	$	193		($	1,532	)	$	20,258	$	6,470

Fixed charges:
	Total interest expense	$	392		$	305	$	193		$	47		$	57	$	0
	Interest factor in rents(a)		34			34		38			17			17		5

	Total fixed charges	$	426		$	339	$	231		$	64		$	74	$	5

Ratio of earnings to fixed charges(b)			(7.64	)		16.63		0.84			(23.94	)		273.76		1,294.00

(a): Interest component of rental expense is estimated based on interest on tenant improvement loan at 4%, which is considered a reasonable approximation of the interest factor.
(b): In 2006, we were still recovering from the effects of quality problems with certain of our products, while in 2009 earnings were weak from the global financial crisis.

Due to our losses in each of the fiscal years presented, the ratio coverage was less than 1:1.