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Organization, Basis of Presentation, and Summary of Significant Accounting Policies - Reconciliation of Cash, Cash Equivalents (Details) - USD ($)
$ in Thousands
Aug. 25, 2019
May 26, 2019
Aug. 26, 2018
May 27, 2018
Accounting Policies [Abstract]        
Cash and cash equivalents $ 1,990 $ 1,080    
Restricted cash 385 385    
Cash, cash equivalents and restricted cash $ 2,375 $ 1,465 $ 1,684 $ 3,216