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Warranty - Reconciliation of Accrued Warranty (Detail) - USD ($)
$ in Thousands
6 Months Ended
Dec. 03, 2017
Nov. 30, 2016
Dec. 03, 2017
May 31, 2017
Nov. 30, 2016
Guarantees [Abstract]          
Balance at the beginning of the period $ 7,557 $ 7,317      
Accruals for warranties 3,030 3,842      
Settlements made during the period (3,871) (3,280)      
Balance at the end of the period 6,716 7,879      
Accrued warranty $ 6,716 $ 7,879 $ 6,716 $ 7,557 $ 7,879
Non-current balance     2,800 2,800 2,500
Accrued warranty     $ 3,916 $ 4,757 $ 5,379