Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment - Schedule of Property and Equipment (Details)

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Property and Equipment - Schedule of Property and Equipment (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 28, 2019
Dec. 29, 2018
Property Plant And Equipment [Line Items]    
Property plant and equipment, gross $ 6,609 $ 6,174
Less accumulated depreciation and amortization (5,807) (5,557)
Total property and equipment, net 802 617
Building and Improvements    
Property Plant And Equipment [Line Items]    
Property plant and equipment, gross $ 68 67
Building and Improvements | Minimum    
Property Plant And Equipment [Line Items]    
Estimated useful life 18 years  
Building and Improvements | Maximum    
Property Plant And Equipment [Line Items]    
Estimated useful life 30 years  
Equipment (Including Computer Software)    
Property Plant And Equipment [Line Items]    
Property plant and equipment, gross $ 6,408 6,049
Equipment (Including Computer Software) | Minimum    
Property Plant And Equipment [Line Items]    
Estimated useful life 3 years  
Equipment (Including Computer Software) | Maximum    
Property Plant And Equipment [Line Items]    
Estimated useful life 15 years  
Projects Under Construction    
Property Plant And Equipment [Line Items]    
Property plant and equipment, gross $ 133 $ 58