Basic and Diluted Net Income Per Share - Summary of Computation of Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 01, 2021	Oct. 02, 2020	Jul. 03, 2020	Apr. 03, 2020	Jan. 03, 2020	Sep. 27, 2019	Jun. 28, 2019	Mar. 29, 2019	Jan. 01, 2021	Jan. 03, 2020	Dec. 28, 2018
Numerator:
Net income	$ 3,327	$ 3,892	$ (1,172)	$ (134)	$ 6,379	$ 2,388	$ 3,914	$ 1,367	$ 5,913	$ 14,048	$ 4,968
Weighted average common shares:
Common shares outstanding									45,616	44,504	42,598
Less: Unvested restricted stock									(11)	(11)	(11)
Denominator for basic calculation									45,605	44,493	42,587
Weighted average effects of potentially diluted common stock:
Diluted									47,953	46,895	45,257
Net income per share:
Basic	$ 0.07	$ 0.08	$ (0.03)		$ 0.14	$ 0.05	$ 0.09	$ 0.03	$ 0.13	$ 0.32	$ 0.12
Diluted	$ 0.07	$ 0.08	$ (0.03)		$ 0.14	$ 0.05	$ 0.08	$ 0.03	$ 0.12	$ 0.30	$ 0.11
Employee Stock Options
Weighted average effects of potentially diluted common stock:
Diluted									2,272	2,254	2,360
Unvested Restricted Stock
Weighted average effects of potentially diluted common stock:
Diluted									4	6	10
Restricted Stock Units
Weighted average effects of potentially diluted common stock:
Diluted									71	142	300
Performance Stock Units
Weighted average effects of potentially diluted common stock:
Diluted									1