Stockholders' Equity - Restricted Stock Units Outstanding, Vested and Expected to Vest (Details) - Restricted Stock Units (RSUs) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Restricted stock units outstanding, vested and expected to vest
Restricted stock units outstanding, Number of Shares	335,805	147,589	277,390	269,259
Restricted stock units outstanding, Weighted Average Remaining Contractual Life (years)	1 year 11 months 12 days
Restricted stock units outstanding, Aggregate Intrinsic Value	$ 4,721
Restricted stock units vested and expected to vest, Number of Shares	218,412
Restricted stock units vested and expected to vest, Weighted Average Remaining Contractual Life (years)	1 year 10 months 13 days
Restricted stock units vested and expected to vest, Aggregate Intrinsic Value	$ 3,071