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Income Taxes (Narrative) (Details) - USD ($)
12 Months Ended
May 30, 2020
May 25, 2019
May 26, 2018
Income Taxes [Abstract]      
Income tax receivable $ 3,500,000 $ 1,000,000  
Tax benefit related to stock-based compensation for nonqualified stock options expensed and for eligible disqualifying ISO exercises and shares issued under ESPP 900,000 1,800,000  
Foreign net operating loss carryforwards 53,193,000    
Tax credit carryforward 600,000    
Undistributed earnings of foreign subsidiaries 21,100,000    
Unrecognized tax benefits $ 848,000 $ 42,000 $ 42,000