Stockholders' Equity - Restricted Stock Units Outstanding, Vested and Expected to Vest (Details) - Restricted Stock Units (RSUs) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Restricted stock units outstanding, vested and expected to vest
Restricted stock units outstanding, Number of Shares	147,589	277,390	269,259	55,999
Restricted stock units outstanding, Weighted Average Remaining Contractual Life (years)	2 years 8 months 9 days
Restricted stock units outstanding, Aggregate Intrinsic Value	$ 1,371
Restricted stock units vested and expected to vest, Number of Shares	109,852
Restricted stock units vested and expected to vest, Weighted Average Remaining Contractual Life (years)	2 years 6 months 26 days
Restricted stock units vested and expected to vest, Aggregate Intrinsic Value	$ 1,021