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Stock-Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 28, 2020
Jun. 30, 2019
Jun. 28, 2020
Jun. 30, 2019
Jan. 15, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares granted in period     863,128    
Number of shares vested     416,253    
Stock-based compensation $ 1,100 $ 1,300 $ 2,241 $ 2,808  
Unrecognized Stock-Based Compensation Expense, Non-vested Shares 6,900   $ 6,900    
Weighted Average Remaining Vesting Period, Non-Vested Shares     2 years 2 months 12 days    
Expected Stock-Based Compensation, Remainder of Fiscal Year $ 2,100   $ 2,100    
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]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     3 years    
Number of Shares Available for Grant         73,128
Restricted Stock Units (RSUs) [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares vested     20,486    
Share Price $ 2.92   $ 2.92