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Commitments and Contingencies (Tables)
9 Months Ended
Oct. 01, 2021
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Product Warranty Liability The change in product warranty liability comprised the following (in thousands):
December 31, 2020$163 
Additions to warranty reserve, net of reversals(10)
Adjustments to pre-existing warranties (71)
October 1, 2021$82