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Summary of Significant Accounting Policies - Schedule of Change in Accumulated Other Comprehensive Income (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Apr. 01, 2017
Accounting Policies [Abstract]    
Accumulated other comprehensive loss, beginning of period $ (2,941)  
Foreign currency translation adjustments (270) $ 566
Accumulated other comprehensive loss, end of period $ (3,211)