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Stock-Based Compensation (Narrative) (Details) - USD ($)
9 Months Ended
Jan. 02, 2020
Jan. 02, 2019
Sep. 30, 2021
Sep. 30, 2020
May 15, 2018
The 2018 Incentive Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares authorized         250,000
Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares granted   24,500      
Shares forfeited     0    
Vested period     3 years    
Shares issued     0    
Stock based compensation expense     $ 80,000 $ 88,000  
Unrecognized stock based compensation expense     $ 26,000    
Unrecognized expense period     3 months    
Year One [Member] | Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Percentage of shares vested 33.30%   66.60%