Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2015	Jun. 29, 2014	Jun. 28, 2015	Jun. 29, 2014
Earnings Per Share [Abstract]
Net income (loss)	$ (4,977)	$ (1,932)	$ (14,253)	$ (9,361)
Basic and diluted weighted average common shares outstanding	34,899,019	30,766,524	34,890,661	26,959,024
Basic and diluted net income (loss) per share	$ (0.14)	$ (0.06)	$ (0.41)	$ (0.35)
Common shares excluded from diluted net loss per share computation	10,019,107	9,947,956	10,019,107	9,947,956