Stockholders' Equity - Restricted Stock Units Outstanding, Vested and Expected to Vest (Details) - Restricted Stock Units (RSUs) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Restricted stock units outstanding, vested and expected to vest
Restricted stock units outstanding, Number of Shares	524,851	411,133	597,121
Restricted stock units outstanding, Weighted Average Remaining Contractual Life (years)	8 months 12 days
Restricted stock units outstanding, Aggregate Intrinsic Value	$ 1,317
Restricted stock units vested and expected to vest, Number of Shares	467,764
Restricted stock units vested and expected to vest, Weighted Average Remaining Contractual Life (years)	7 months 20 days
Restricted stock units vested and expected to vest, Aggregate Intrinsic Value	$ 1,174