Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Mar. 30, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Reserves for accounts receivable	$ 1,328	$ 1,354
Common stock, par value	$ 0.002	$ 0.002
Common stock, shares authorized	140,000	140,000
Common stock, shares issued	86,840	86,831