Stockholders' Equity (Details 5) (Restricted stock units, USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Restricted stock units
Restricted stock units outstanding, vested and expected to vest
Restricted stock units outstanding, Number of Shares	269,259	55,999	90,189
Restricted stock units outstanding, Weighted Average Remaining Contractual Life (years)	10 months 10 days
Restricted stock units outstanding, Aggregate Intrinsic Value	$ 2,604
Restricted stock units vested and expected to vest, Number of Shares	243,471
Restricted stock units vested and expected to vest, Weighted Average Remaining Contractual Life (years)	10 months 6 days
Restricted stock units vested and expected to vest, Aggregate Intrinsic Value	$ 2,354