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Basic and Diluted Net Income (Loss) Per Share - Summary of Computation of Basic and Diluted Net Income (Loss) Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jul. 03, 2020
Jun. 28, 2019
Jul. 03, 2020
Jun. 28, 2019
Numerator:        
Net income (loss) $ (1,172) $ 3,914 $ (1,306) $ 5,281
Weighted average common shares:        
Common shares outstanding 45,354 44,489 45,152 44,368
Less: Unvested restricted stock   (10)   (11)
Denominator for basic calculation 45,354 44,479 45,152 44,357
Weighted average effects of potentially diluted common stock:        
Diluted 45,354 46,733 45,152 46,842
Net income (loss) per share:        
Basic $ (0.03) $ 0.09 $ (0.03) $ 0.12
Diluted $ (0.03) $ 0.08 $ (0.03) $ 0.11
Employee Stock Options        
Weighted average effects of potentially diluted common stock:        
Diluted   2,149   2,292
Unvested Restricted Stock        
Weighted average effects of potentially diluted common stock:        
Diluted   97   185
Restricted Stock Units        
Weighted average effects of potentially diluted common stock:        
Diluted   8   8