Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 27, 2015	Jun. 28, 2014	Jun. 27, 2015	Jun. 28, 2014
Net Loss Per Share [Abstract]
Net loss		$ (8,579)	$ (3,480)	$ (3,924)	$ (7,721)
Basic and diluted weighted average common shares outstanding	[1]	195,732	196,114	197,991	195,651
Basic and diluted net loss per share		$ (0.04)	$ (0.02)	$ (0.02)	$ (0.04)
Antidilutive securities excluded from computation of loss per share		4,800,000	3,500,000	5,100,000	3,300,000

[1] PMC-Sierra Ltd. special shares are included in the calculation of basic and diluted weighted average common shares outstanding.