Quarterly report pursuant to Section 13 or 15(d)

Short Term Debt - Summary of Short Term Debt and Other Financing Obligations (Details)

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Short Term Debt - Summary of Short Term Debt and Other Financing Obligations (Details) - USD ($)
$ in Thousands
Sep. 26, 2020
Dec. 28, 2019
Short Term Debt [Line Items]    
Total short term debt $ 3,327 $ 280
AFCO Finance    
Short Term Debt [Line Items]    
Total short term debt 287 155
GE 8% Loan Agreement    
Short Term Debt [Line Items]    
Total short term debt   $ 125
Payroll Protection Program    
Short Term Debt [Line Items]    
Total short term debt 1,872  
Vendor advance payments    
Short Term Debt [Line Items]    
Total short term debt $ 1,168