Net Income Per Share (Tables)

12 Months Ended

Dec. 28, 2012

Net Income Per Share [Abstract]

Basic and diluted net income (loss) per share

	Year Ended
	December 28, 2012		December 30, 2011		December 31, 2010
Numerator:
Net income	$	5,153	$	23,734	$	20,097
Denominator:
Shares used in computation — basic:
Weighted average common shares outstanding		25,698		22,689		21,799
Shares used in computation — diluted:
Weighted average common shares outstanding		25,698		22,689		21,799
Dilutive effect of common shares outstanding subject to repurchase		244		241		208
Dilutive effect of options outstanding		319		507		968
Shares used in computing diluted net income per share		26,261		23,437		22,975
Net income per share — basic	$	0.20	$	1.05	$	0.92
Net income per share — diluted	$	0.20	$	1.01	$	0.87

Summary of outstanding securities excluded in computation of diluted net income (loss) per share

	Year Ended
	December 28, 2012		December 30, 2011		December 31, 2010
Outstanding options		1,514		1,655		1,983