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Warranty - Reconciliation of Accrued Warranty (Detail) - USD ($)
$ in Thousands
3 Months Ended
Sep. 03, 2017
Aug. 31, 2016
Sep. 03, 2017
May 31, 2017
Aug. 31, 2016
Guarantees [Abstract]          
Balance at the beginning of the period $ 7,557 $ 7,317      
Accruals for warranties 1,399 1,848      
Settlements made during the period (2,068) (1,548)      
Balance at the end of the period 6,888 7,617      
Accrued warranty $ 6,888 $ 7,617 $ 6,888 $ 7,557 $ 7,617
Non-current balance     2,800 2,800 2,500
Accrued warranty     $ 4,088 $ 4,757 $ 5,117