XML 47 R36.htm IDEA: XBRL DOCUMENT v3.3.0.814
Summary of Significant Accounting Policies - Changes in Product Warranty Accrual (Detail) - USD ($)
$ in Thousands
9 Months Ended
Oct. 03, 2015
Sep. 27, 2014
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]    
Warranty accrual, beginning of period $ 1,416 $ 1,161
Provision for warranty costs 679 684
Product Warranty Accrual, Preexisting, Increase (Decrease) (52) 25
Settlements made (828) (812)
Warranty accrual, end of period $ 1,215 $ 1,058