Quarterly report pursuant to Section 13 or 15(d)

Acquisitions (Purchase Price) (Details)

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Acquisitions (Purchase Price) (Details) - SSL - USD ($)
$ in Thousands
12 Months Ended
Dec. 29, 2018
Oct. 08, 2018
Sep. 29, 2018
Business Acquisition [Line Items]      
Cash   $ 2,000  
Provisional working capital adjustment   729 $ 700
Total consideration $ 12,529 12,529  
Promissory note      
Business Acquisition [Line Items]      
Promissory note   6,800  
Capital lease financing      
Business Acquisition [Line Items]      
Promissory note   $ 3,000