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Stock-Based Compensation - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 28, 2021
Mar. 29, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Recognized stock-based compensation expense $ 193 $ 490
Common Share Options [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Recognized stock-based compensation expense 100 200
Unrecognized stock compensation expense $ 100  
Unrecognized stock compensation expense, recognition period 2022  
Performance Stock Units [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Grants vesting period 5 years  
Performance Stock Units [Member] | Market Vesting Conditions [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Recognized stock-based compensation expense $ 100  
Employee and Non Employee Directors [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Grants vesting period 4 years  
Method used to determine fair value of the options Black-Scholes option pricing model  
Stock options granted 0  
Non-Employee Board Of Directors [Member] | Restricted Stock Units (RSUs) [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Grants vesting period 3 years  
Recognized stock-based compensation expense $ 100 $ 300
Unrecognized stock compensation expense $ 1,900  
Unrecognized stock compensation expense, recognition period 2023  
Vesting description The employee grants vest in one-third increments over a three-year period.  
Non-Employee Board Of Directors [Member] | Restricted Stock Units (RSUs) [Member] | First Anniversary [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting percentage 50.00%  
Non-Employee Board Of Directors [Member] | Restricted Stock Units (RSUs) [Member] | Second Anniversary [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting percentage 50.00%