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Commitments and Contingencies - Additional Information (Detail) - USD ($)
3 Months Ended
Sep. 03, 2017
May 31, 2017
Aug. 31, 2016
Loss Contingencies [Line Items]      
Maximum potential repurchase liability $ 29,000,000 $ 30,000,000  
Other accrued liabilities 100,000 $ 100,000  
Obligations from units repurchased $ 0   $ 0
Minimum [Member]      
Loss Contingencies [Line Items]      
Period to potentially repurchase units 12 months 12 months  
Maximum [Member]      
Loss Contingencies [Line Items]      
Period to potentially repurchase units 24 months 24 months