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Stock-based Compensation and Treasury Stock (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Feb. 01, 2022
Jan. 31, 2022
Dec. 31, 2021
Jan. 31, 2021
Apr. 30, 2022
Apr. 30, 2021
Apr. 30, 2022
Apr. 30, 2021
Oct. 31, 2021
Class of Stock [Line Items]                  
Authorized amount under share repurchase program                 $ 10,000
Shares repurchased (in shares)             0    
Management                  
Class of Stock [Line Items]                  
Shares exchanged (in shares)         68,080 46,993      
Fair value of common stock for the payment of payroll taxes associated with the vesting of shares under stock-based compensation programs         $ 1,086 $ 701      
Stock-Based Compensation                  
Class of Stock [Line Items]                  
Vesting period             2 years    
Stock-Based Compensation | Management                  
Class of Stock [Line Items]                  
Shares granted (in shares)                 0
Stock-Based Compensation | Key Executives                  
Class of Stock [Line Items]                  
Vesting period             3 years    
Shares granted (in shares)     70,000            
Common stock per share (in dollars per share)     $ 14.96            
Shares issued, shares, share-based payment arrangement, forfeited (in shares) 15,000                
Share-based compensation expense             $ 823    
Stock-Based Compensation | Key Executives | Minimum                  
Class of Stock [Line Items]                  
Vesting period             3 years    
Stock-Based Compensation | Key Executives | Maximum                  
Class of Stock [Line Items]                  
Vesting period             5 years    
Stock-Based Compensation | Non-Employee Directors                  
Class of Stock [Line Items]                  
Shares granted (in shares)   46,279   27,815          
Share-based compensation expense             $ 627 $ 469