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Stockholders' Equity - Schedule of Compensation Cost (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 03, 2020
Dec. 28, 2018
Dec. 29, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Total stock-based compensation expense $ 10,547 $ 6,762 $ 3,161
Employee Stock Option      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Total stock-based compensation expense 8,144 4,013 1,731
Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Total stock-based compensation expense 320 274 186
Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Total stock-based compensation expense 1,905 2,120 1,226
Non Employee Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Total stock-based compensation expense $ 178 $ 355 $ 18