Stockholders' Equity and Stock-Based Compensation - Summary of Stock Options Outstanding, Vested, Expected to Vest and Exercisable (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 27, 2020	Dec. 28, 2019
Stock options outstanding, exercisable and expected to vest
Options outstanding, Number of Shares	1,276,664	1,383,552
Options vested and expected to vest, Number of Shares	1,127,406
Options exercisable, Number of Shares	515,816
Options outstanding, Weighted Average Exercise Price	$ 5.74	$ 6.11
Options vested and expected to vest, Weighted Average Exercise Price	5.92
Options exercisable, Weighted Average Exercise Price	$ 7.42
Options outstanding, Weighted Average Remaining Contractual Life (Years)	5 years 25 days
Options vested and expected to vest, Weighted Average Remaining Contractual Life (Years)	4 years 11 months 12 days
Options exercisable, Weighted Average Remaining Contractual Life (Years)	3 years 10 months 9 days
Options outstanding, Aggregate Intrinsic Value	$ 4
Options vested and expected to vest, Aggregate Intrinsic Value	$ 3