Quarterly Financial Data - Summary of Quarterly Financial Data (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 64,670	$ 59,962	$ 66,652	$ 56,016	$ 50,714	$ 57,748	$ 59,404	$ 53,296	$ 247,300	$ 221,162	$ 308,968
Gross profit	18,948	14,521	21,473	15,584	16,649	18,126	17,664	15,539	70,526	67,978
Net loss	$ (6,450)	$ (10,820)	$ (4,045)	$ (12,103)	$ (5,161)	$ (1,749)	$ (2,109)	$ (3,224)	$ (33,418)	$ (12,243)	$ 15,719
Net loss per share
Basic	$ (0.26)	$ (0.43)	$ (0.16)	$ (0.49)	$ (0.21)	$ (0.07)	$ (0.09)	$ (0.13)	$ (1.34)	$ (0.50)	$ 0.65
Diluted	$ (0.26)	$ (0.43)	$ (0.16)	$ (0.49)	$ (0.21)	$ (0.07)	$ (0.09)	$ (0.13)	$ (1.34)	$ (0.50)	$ 0.64