Income (Loss) Per Share - Numerators and Denominators of Basic and Diluted Net Income (Loss) Per Share Computations (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2013	Jun. 29, 2012	Jun. 28, 2013	Jun. 29, 2012
Numerator:
Loss from continuing operations	$ (3,404)	$ (3,875)	$ (12,907)	$ (12,610)
Income (loss) from discontinued operations	(396)	3,892	15,528	5,099
Net income (loss)	$ (3,800)	$ 17	$ 2,621	$ (7,511)
Denominator:
Weighted average number of common shares outstanding Basic and diluted	109,938	117,056	112,534	117,162
Basic and diluted net income (loss) per share from:
Continuing operations	$ (0.03)	$ (0.03)	$ (0.11)	$ (0.11)
Discontinued operations	$ 0.00	$ 0.03	$ 0.14	$ 0.04
Net income (loss)	$ (0.03)	$ 0.00	$ 0.02	$ (0.06)