Omnibus Incentive Plan - Stock Options Activity (Details)
$ / shares in Units, $ in Thousands
9 Months Ended
May 29, 2021
USD ($)
$ / shares
shares
May 30, 2020
USD ($)
Additional disclosures    
Proceeds from option exercises | $ $ 700 $ 931
Stock Options    
Shares    
Outstanding at beginning of period (in shares) | shares 2,615,899  
Granted (in shares) | shares 289,555  
Exercised (in shares) | shares (58,308)  
Forfeited (in shares) | shares (53,983)  
Outstanding at end of period (in shares) | shares 2,793,163  
Options vested or expected to vest (in shares) | shares 2,793,163  
Exercisable (in shares) | shares 2,215,040  
Weighted average exercise price    
Outstanding at beginning of period (in dollars per share) | $ / shares $ 14.33  
Granted (in dollars per share) | $ / shares 20.47  
Exercised (in dollars per share) | $ / shares 12.00  
Forfeited (in dollars per share) | $ / shares 22.33  
Outstanding at end of period (in dollars per share) | $ / shares 14.86  
Options vested or expected to vest (in dollars per share) | $ / shares 14.86  
Exercisable (in dollars per share) | $ / shares $ 13.25  
Weighted average remaining contractual term    
Outstanding at end of period, weighted average remaining contractual life 6 years 10 months 6 days  
Vested and expected to vest at end of period, weighted average remaining contractual life 6 years 10 months 6 days  
Exercisable at end of period, weighted average remaining contractual life 6 years 4 months 13 days  
Additional disclosures    
Unrecognized compensation costs | $ $ 2,900  
Period for recognition of unrecognized compensation cost 1 year 8 months 12 days  
Proceeds from option exercises | $ $ 700 $ 900