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Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
May 30, 2021
May 31, 2020
May 26, 2019
May 27, 2018
Tax Credit Carryforward [Line Items]        
Effective tax rate for the fiscal year (19.29%) (25.56%) 70.66%  
Researach and development tax credit carryforward   $ 2,800    
Tax reform/CARES Act benefit $ 0 2,770 $ 0  
Deferred tax asset valuation allowance 10,460 6,770    
Unrecognized tax benefits 942 $ 827 $ 616 $ 479
Unrecognized tax benefits that would change the effect tax rate if recognized 800      
Domestic Tax Authority        
Tax Credit Carryforward [Line Items]        
Net operating loss carryforwards 68,100      
Tax credit carryforward amount $ 2,600      
Tax credit carryforward, period 20 years      
Deferred tax asset valuation allowance $ 1,400      
Foreign Tax Authority        
Tax Credit Carryforward [Line Items]        
Net operating loss carryforwards 14,800      
Deferred tax asset valuation allowance 4,900      
State and Local Jurisdiction        
Tax Credit Carryforward [Line Items]        
Deferred tax asset valuation allowance 4,200      
California        
Tax Credit Carryforward [Line Items]        
Net operating loss carryforwards 24,200      
Tax credit carryforward amount 2,000      
Indiana        
Tax Credit Carryforward [Line Items]        
Net operating loss carryforwards 10,400      
Other States, Tax Board        
Tax Credit Carryforward [Line Items]        
Net operating loss carryforwards 16,700      
Minnesota        
Tax Credit Carryforward [Line Items]        
Tax credit carryforward amount $ 1,200      
Tax credit carryforward, period 15 years