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Shareholders' Equity and Share-Based Payment Arrangement, Option, Activity (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Apr. 29, 2023
Apr. 30, 2022
May 01, 2021
Stock Options      
Outstanding at beginning of period (in shares) 2,107    
Granted (in shares) 336    
Canceled or forfeited (in shares) (393)    
Exercised (in shares) (5)    
Outstanding at ending of period (in shares) 2,045 2,107  
Shares vested and expected to vest (in shares) 2,010    
Exercisable (in shares) 1,222    
Weighted Average Exercise Price Per Share      
Outstanding at beginning of period (in dollars per share) $ 8.13    
Granted (in dollars per share) 3.02    
Canceled or forfeited (in dollars per share) 9.08    
Exercised (in dollars per share) 4.11    
Outstanding at ending of period (in dollars per share) 7.11 $ 8.13  
Shares vested and expected to vest, weighted average exercise price per share (in dollars per share) 7.17    
Exercisable, weighted average exercise price per share (in dollars per share) $ 8.95    
Outstanding, weighted average remaining contractual life 5 years 6 months 7 days 4 years 11 months 23 days  
Shares vested and expected to vest, weighted average remaining contractual life 5 years 5 months 15 days    
Exercisable, weighted average remaining contractual life 3 years 8 months 12 days    
Outstanding at beginning of period, aggregate intrinsic value $ 858 $ 0  
Exercised, aggregate intrinsic value 7 $ 2 $ 0
Shares vested and expected to vest, aggregate intrinsic value 819    
Exercisable, aggregate intrinsic value $ 103