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Revenue Recognition - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Sep. 26, 2019
Jun. 27, 2019
Sep. 27, 2018
Disaggregation of Revenue [Line Items]      
Contract assets $ 0 $ 117 $ 196
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Transferred at Point in Time [Member]      
Disaggregation of Revenue [Line Items]      
Risk percentage 99.00%