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Stock-Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 29, 2019
Sep. 30, 2018
Sep. 29, 2019
Sep. 30, 2018
Sep. 16, 2019
Jan. 15, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares granted in period     474,970      
Number of shares vested     473,123      
Stock-based compensation $ 1,707 $ 1,531 $ 4,515 $ 4,501    
Unrecognized Stock-Based Compensation Expense, Non-vested Shares 5,800   $ 5,800      
Weighted Average Remaining Vesting Period, Non-Vested Shares     1 year 7 months 12 days      
Expected Stock-Based Compensation, Remainder of Fiscal Year $ 1,300   $ 1,300      
Certain Employees and Officers [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of Shares Available for Grant           417,500
Outside Directors [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of Shares Available for Grant           47,470
Interim Vice President-Chief Financial Officer and Treasurer [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of Shares Available for Grant         10,000  
Restricted Stock Units (RSUs) [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares granted in period     67,452      
Award Vesting Period     3 years      
Number of shares vested     19,011      
Share Price $ 8.59   $ 8.59