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Goodwill and Intangible Assets - Schedule of Goodwill (Details) - USD ($)
 12 Months Ended
Oct. 30, 2022
Apr. 29, 2023
Apr. 30, 2022
May 01, 2021
Goodwill [Roll Forward]        
Beginning Balance   $ 7,927,000    
Foreign currency translation   (112,000)    
Goodwill impairment $ (4,576,000) (4,576,000) $ 0 $ 0
Ending Balance   3,239,000 7,927,000  
Live Events        
Goodwill [Roll Forward]        
Beginning Balance   2,296,000    
Foreign currency translation   (15,000)    
Goodwill impairment   (2,281,000)    
Ending Balance   0 2,296,000  
Commercial        
Goodwill [Roll Forward]        
Beginning Balance   3,349,000    
Foreign currency translation   (151,000)    
Goodwill impairment   0    
Ending Balance   3,198,000 3,349,000  
Transportation        
Goodwill [Roll Forward]        
Beginning Balance   68,000    
Foreign currency translation   (27,000)    
Goodwill impairment   0    
Ending Balance   41,000 68,000  
International        
Goodwill [Roll Forward]        
Beginning Balance   2,214,000    
Foreign currency translation   81,000    
Goodwill impairment   (2,295,000)    
Ending Balance   $ 0 $ 2,214,000