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Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Feb. 24, 2019
Feb. 25, 2018
Feb. 24, 2019
Feb. 25, 2018
May 27, 2018
May 28, 2017
Income Tax Disclosure [Abstract]            
Federal statutory tax rate     46.00% 29.00% 29.40% 35.00%
Additional tax expense     $ 347      
Income tax (benefit) expense $ 242 $ (12,827) 584 $ (11,352)    
Effective tax rate benefit       154.00%    
Unrecognized tax benefits 618   618   $ 479  
Unrecognized tax benefits that would result in an adjustment to effective tax rate $ 538   $ 538   $ 372