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Warranty Obligations (Tables)
9 Months Ended
Sep. 29, 2019
Product Warranties Disclosures [Abstract]  
Changes in Warranty Obligations
The changes in the warranty obligation were as follows (in thousands):
Balance as of December 31, 2018
$
4,743

Provisions for warranties issued during the period
3,301

Fulfillment of warranty obligations
(2,770
)
Balance as of September 29, 2019
$
5,274