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Warranty Obligations (Tables)
9 Months Ended
Sep. 27, 2020
Product Warranties Disclosures [Abstract]  
Changes in Warranty Obligations
The changes in the warranty obligation were as follows (in thousands):
Balance as of December 31, 2019$4,713 
Provisions for warranties issued during the period2,671 
Fulfillment of warranty obligations(1,798)
Balance as of September 27, 2020$5,586