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Condensed Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock
Treasury Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Income (Loss)
Accumulated Deficit
Beginning balance (in shares) at Dec. 28, 2019   75,764,990 0      
Beginning balance at Dec. 28, 2019 $ 640,997 $ 76 $ 0 $ 885,821 $ (659) $ (244,241)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Issuance of common stock under the Employee Stock Purchase Plan (in shares)   311,591        
Issuance of common stock under the Employee Stock Purchase Plan 4,066     4,066    
Issuance of common stock pursuant to exercise of options (in shares)   55,769        
Issuance of common stock pursuant to exercise of options 447 $ 1   446    
Issuance of common stock pursuant to vesting of restricted stock units (in shares)   25,901        
Issuance of common stock pursuant to exercise of options (385) $ 0   (385)    
Stock-based compensation 5,652     5,652    
Other comprehensive loss (250)       (250)  
Net income 15,890         15,890
Ending balance (in shares) at Mar. 28, 2020   76,158,251 0      
Ending balance at Mar. 28, 2020 666,417 $ 77 $ 0 895,600 (909) (228,351)
Beginning balance (in shares) at Dec. 26, 2020   77,437,997 0      
Beginning balance at Dec. 26, 2020 744,084 $ 78 $ 0 903,838 5,886 (165,718)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Issuance of common stock under the Employee Stock Purchase Plan (in shares)   228,784        
Issuance of common stock under the Employee Stock Purchase Plan 5,065     5,065    
Issuance of common stock pursuant to exercise of options (in shares)   50,000        
Issuance of common stock pursuant to exercise of options 422 $ 0   422    
Issuance of common stock pursuant to vesting of restricted stock units (in shares)   41,749        
Issuance of common stock pursuant to exercise of options (1,141) $ 0   (1,141)    
Purchase of common stock through repurchase program (in shares)     (136,402)      
Purchase of common stock through repurchase program (5,738)   $ (5,738)      
Stock-based compensation 6,952     6,952    
Other comprehensive loss (2,736)       (2,736)  
Net income 19,625         19,625
Ending balance (in shares) at Mar. 27, 2021   77,758,530 (136,402)      
Ending balance at Mar. 27, 2021 $ 766,533 $ 78 $ (5,738) $ 915,136 $ 3,150 $ (146,093)