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Stock-Based Compensation - Performance Stock Units (Details) - Performance Stock Units - USD ($)
1 Months Ended 12 Months Ended 24 Months Ended
May 01, 2022
May 01, 2021
May 15, 2020
May 01, 2020
May 31, 2020
Mar. 29, 2020
Mar. 31, 2019
Apr. 01, 2018
May 01, 2022
Stock-based compensation                  
Measurement period           1 year 1 year    
PSU Activity                  
Unvested shares available for issue under outstanding PSUs, beginning of period (in shares)           98,306 67,000 170,100  
Granted (in shares)           51,616 71,000 86,000  
Vested (in shares)           (29,036) (14,257) (7,600)  
Forfeited/cancelled (in shares)           (52,532) (25,437) (181,500)  
Unvested shares available for issue under outstanding PSUs, end of period (in shares)           68,355 98,306 67,000  
Unvested PSUs, Weighted-Average Fair Value at Grant Date                  
Unvested shares available for issue under outstanding PSUs, beginning of period (in dollars per share)           $ 14.55 $ 12.65 $ 11.17  
Granted (in dollars per share)           15.93 15.58 12.67  
Vested (in dollars per share)           14.09 12.66 19.58  
Forfeited/cancelled (in dollars per share)           9.82 13.46 10.99  
Unvested shares available for issue under outstanding PSUs, end of period (in dollars per share)           $ 19.42 $ 14.55 $ 12.65  
Additional stock based compensation information                  
Unrecognized compensation costs (in dollars)           $ 300,000      
Total fair value of shares vested during period (in dollars)           $ 780,400 $ 460,800 $ 277,600  
Shares earned, but not yet vested (in shares)           35,239      
Forecast                  
PSU Activity                  
Vested (in shares) (5,309) (10,739)   (19,191)         (35,239)
Subsequent Event                  
PSU Activity                  
Forfeited/cancelled (in shares)     (33,116)   (33,116)