Computation of Basic and Diluted Net (Loss) Income Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 30, 2012	Sep. 28, 2013	Sep. 30, 2012
Numerator:
Net income (loss) attributable to common stockholders	$ 1,386	$ 1,061	$ (7,739)	$ 1,515
Denominator:
Weighted average shares used for basic net income (loss) per share computation	30,933	17,300	22,529	17,300
Weighted average effect of dilutive securities:
Weighted average effect of dilutive securities, Equity awards	1,621	7
Weighted average shares used for diluted net income (loss) per share computation	32,554	17,307	22,529	17,300
Net income (loss) per share attributable to common stockholders:
Basic	$ 0.04	$ 0.06	$ (0.34)	$ 0.09
Diluted	$ 0.04	$ 0.06	$ (0.34)	$ 0.09