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Transactions with Related Parties - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
May 31, 2018
Mar. 30, 2019
Sep. 25, 2018
Maximum [Member] | Principal Shareholders [Member]      
Related Party Transaction [Line Items]      
Ownership percentage     50.00%
Management Advisory [Member] | Services Agreement [Member]      
Related Party Transaction [Line Items]      
Annual management fee $ 0.3 $ 1.5