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Commitments and Contingencies (Tables)
 9 Months Ended
Sep. 25, 2020
Commitments and Contingencies Disclosure [Abstract]  
Summary of Warranty Accrual Included in Accrued Liabilities Activity for the Company’s warranty accrual, which is included in “Accrued and other current liabilities”, is summarized below (in thousands):
 
Three months ended
 
Nine months ended
 
September 25,
2020
 
September 27,
2019
 
September 25,
2020
 
September 27,
2019
Balance at beginning of period
$
3,818

 
$
4,802

 
$
4,314

 
$
4,869

   Accrual for current period warranties
673

 
1,170

 
2,342

 
4,143

   Warranty costs incurred
(910
)
 
(1,391
)
 
(3,075
)
 
(4,431
)
Balance at end of period
$
3,581

 
$
4,581

 
$
3,581

 
$
4,581