Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation - Restricted Stock Transactions (Details)

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Share-Based Compensation - Restricted Stock Transactions (Details) - $ / shares
 3 Months Ended 12 Months Ended
Dec. 29, 2023
Dec. 29, 2022
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Restricted Stock Awards | Tranche One            
Number of RSAs            
Vested (in shares)   (5,979)        
Restricted Stock Awards | Tranche Two            
Number of RSAs            
Vested (in shares) (3,891)          
Weighted-Average Grant-Date Fair Value per Share            
Award vesting period     3 years      
Restricted Stock Awards | Employee | 2021 Plan            
Number of RSAs            
Nonvested, beginning of period (in shares)     0 4,011 4,011  
Granted (in shares)     0 0    
Vested (in shares)     0 0    
Cancelled and forfeited (in shares)     0 0 (120)  
Nonvested, at end of period (in shares)     0 4,011 0  
Weighted-Average Grant-Date Fair Value per Share            
Non-vested, beginning of period (in dollars per share)     $ 0 $ 417 $ 0 $ 417
Granted (in dollars per share)     0 0    
Vested (in dollars per share)     0 0    
Cancelled and forfeited (in dollars per share)     0 0    
Non-vested, at end of period (in dollars per share)     $ 0 $ 417 $ 0  
Restricted Stock Awards | Director | 2021 Directors Plan            
Number of RSAs            
Nonvested, beginning of period (in shares)     1,134 2,097 2,097  
Granted (in shares)     0 1,458    
Vested (in shares)     (1,134) (1,785)    
Cancelled and forfeited (in shares)     0 0    
Nonvested, at end of period (in shares)     0 1,770 1,134  
Weighted-Average Grant-Date Fair Value per Share            
Non-vested, beginning of period (in dollars per share)     $ 0 $ 730 $ 781 427
Granted (in dollars per share)     0 781    
Vested (in dollars per share)     781 416    
Cancelled and forfeited (in dollars per share)     0 0    
Non-vested, at end of period (in dollars per share)     $ 0 $ 730 $ 781  
Restricted Stock Units (RSUs) | Employee | 2021 Plan            
Number of RSAs            
Nonvested, beginning of period (in shares)     18,675 16,836 16,836  
Granted (in shares)     12,297 8,544    
Vested (in shares)     (6,213) (3,810)    
Cancelled and forfeited (in shares)     (306) 0    
Nonvested, at end of period (in shares)     24,453 21,570 18,675  
Weighted-Average Grant-Date Fair Value per Share            
Non-vested, beginning of period (in dollars per share)     $ 514 $ 533 $ 527 $ 441
Granted (in dollars per share)     478 641    
Vested (in dollars per share)     484 368    
Cancelled and forfeited (in dollars per share)     528 0    
Non-vested, at end of period (in dollars per share)     $ 514 $ 533 $ 527  
Restricted Stock Awards and Restricted Stock Units | Employee | 2021 Plan            
Number of RSAs            
Vested (in shares)     (6,213)      
Weighted-Average Grant-Date Fair Value per Share            
Shares withheld for tax withholdings (in shares)     2,469