XML 111 R95.htm IDEA: XBRL DOCUMENT v3.10.0.1
Commitments and Contingencies (Change in Product Warranty Liability) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 28, 2018
Dec. 29, 2017
Movement in Standard Product Warranty Accrual [Roll Forward]    
Beginning balance $ 2,820 $ 2,764
Additions to warranty reserve, net of reversals 620 917
Warranty claims settled (840) (861)
Ending balance $ 2,600 $ 2,820