Cash, Cash Equivalents and Restricted Cash (Tables)
 6 Months Ended
Jun. 27, 2020
Cash and Cash Equivalents [Abstract]  
Summary of cash and cash equivalents
Cash, cash equivalents and restricted cash consisted of the following (in thousands):
June 27,
2020		December 31,
2019
Cash and cash equivalents:
Cash$50,552  $46,815  
Money market funds—  14  
Total cash and cash equivalents50,552  46,829  
Restricted cash628  628  
$51,180  $47,457