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Geographical Information - Additional Information (Detail) - USD ($)
$ in Millions
Dec. 29, 2017
Dec. 30, 2016
China, Singapore and Czech Republic [Member]    
Revenues From External Customers And Long Lived Assets [Line Items]    
Net long-lived assets $ 11.9  
United States [Member]    
Revenues From External Customers And Long Lived Assets [Line Items]    
Net long-lived assets   $ 8.1