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Revenue (Tables)
 6 Months Ended
Jun. 29, 2019
Revenue From Contract With Customer [Abstract]  
Summary of Contract Assets and Liabilities

Contract assets and liabilities consisted of the following (in thousands):

 

 

 

June 29, 2019

 

 

December 29, 2018

 

Contract assets

 

$

4,399

 

 

$

2,189

 

Contract liabilities

 

 

11,481

 

 

 

10,743

 

Net contract liabilities

 

$

7,082

 

 

$

8,554