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Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Feb. 27, 2022
Feb. 27, 2022
May 29, 2022
May 30, 2021
May 31, 2020
May 26, 2019
Tax Credit Carryforward [Line Items]            
Effective tax rate provision (benefit)     (8.56%) (16.59%) (28.63%)  
Income tax benefit     $ 121 $ 5,898 $ 4,342  
Researach and development tax credit carryforward         2,800  
Tax reform/CARES Act benefit     0 0 2,770  
Deferred tax asset valuation allowance     35,942 10,460    
Unrecognized tax benefits     1,025 942 827 $ 616
Unrecognized tax benefits that would change the effect tax rate if recognized     900      
Discontinued Operations            
Tax Credit Carryforward [Line Items]            
Income tax benefit $ 185 $ 408        
Discontinued Operations | Eat Smart            
Tax Credit Carryforward [Line Items]            
Income tax benefit     121 $ 5,898 $ 4,342  
California            
Tax Credit Carryforward [Line Items]            
Net operating loss carryforwards     38,100      
Tax credit carryforward amount     2,100      
Indiana            
Tax Credit Carryforward [Line Items]            
Net operating loss carryforwards     30,600      
Other States, Tax Board            
Tax Credit Carryforward [Line Items]            
Net operating loss carryforwards     21,000      
Minnesota            
Tax Credit Carryforward [Line Items]            
Tax credit carryforward amount     $ 1,400      
Tax credit carryforward, period     15 years      
Domestic Tax Authority            
Tax Credit Carryforward [Line Items]            
Net operating loss carryforwards     $ 74,100      
Tax credit carryforward amount     $ 2,800      
Tax credit carryforward, period     20 years      
Deferred tax asset valuation allowance     $ 19,100      
Foreign Tax Authority            
Tax Credit Carryforward [Line Items]            
Net operating loss carryforwards     25,900      
Deferred tax asset valuation allowance     8,100      
State and Local Jurisdiction            
Tax Credit Carryforward [Line Items]            
Deferred tax asset valuation allowance     $ 8,800