XML 63 R49.htm IDEA: XBRL DOCUMENT v3.10.0.1
Property, Equipment and Leasehold Improvements - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 28, 2018
Dec. 29, 2017
Dec. 30, 2016
Property, Plant and Equipment [Line Items]      
Depreciation and amortization of property, equipment and leasehold improvements $ 6,292 $ 6,285 $ 6,131