Net Income (Loss) Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Earnings Per Share [Abstract]
Net income (loss)	$ (7,429)	$ (5,199)
Basic and diluted weighted average common shares outstanding	23,151,523	22,868,894
Basic and diluted net income (loss) per share	$ (0.32)	$ (0.23)
Common shares excluded from diluted net loss per share computation	9,950,261	10,188,883