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Stock-Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 27, 2020
Sep. 29, 2019
Sep. 27, 2020
Sep. 29, 2019
Jan. 15, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation $ 1,303 $ 1,707 $ 3,543 $ 4,515  
Unrecognized Stock-Based Compensation Expense, Non-vested Shares 7,700   7,700    
Expected Stock-Based Compensation, Remainder of Fiscal Year $ 1,300   $ 1,300    
Weighted Average Remaining Vesting Period, Non-Vested Shares     4 years 3 months 18 days    
Granted (in shares)     1,075,000    
Granted (in dollars per share)     $ 7.12    
Number of shares vested (in shares)     416,253    
Share price (in dollars per share) $ 6.31   $ 6.31    
Restricted Stock [Member] | Certain Employees and Officers [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of Shares Available for Grant         790,000
Restricted Stock [Member] | Outside Directors [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of Shares Available for Grant         73,128
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     3 years    
Restricted Stock Units (RSUs) [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares vested (in shares)     20,486    
Share price (in dollars per share) $ 2.92   $ 2.92    
Share-based Payment Arrangement, Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period     7 years    
Non-Qualified Stock Options [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted (in shares)     739,340    
Incentive Stock Options (ISOs) [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted (in shares)     335,660