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Capital Stock - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Oct. 22, 2024
Sep. 20, 2024
Apr. 30, 2025
Apr. 30, 2024
Apr. 30, 2023
Class of Stock [Line Items]          
Common shares, authorized shares (in shares)     50,000,000 50,000,000  
Common shares, par value per share (in dollars per share)   $ 0.01 $ 0.01 $ 0.01  
Preferred shares, authorized shares (in shares)     1,000,000 1,000,000  
Preferred shares, par value per share (in dollars per share)     $ 0.01 $ 0.01  
Preferred shares, issued shares (in shares)     0 0  
Issuance of common stock $ 73,800   $ 74,106 $ 282 $ 286
Common shares, outstanding (in shares)     8,263,280 6,394,675  
Over-Allotment Option          
Class of Stock [Line Items]          
Expiration period (in days)   30 days      
Grant of option shares (in shares)   255,000      
Sale of common stock (in shares) 138,272        
Proceeds from sale of stock $ 5,600        
Public Offering          
Class of Stock [Line Items]          
Issuance of common stock (in shares)   1,700,000      
Shares issued (in dollars per share)   $ 43.00      
Issuance of common stock   $ 73,800      
Over-Allotment Option | Over-Allotment Option          
Class of Stock [Line Items]          
Shares issued (in dollars per share) $ 43.00        
Subsidiaries          
Class of Stock [Line Items]          
Preferred shares, par value per share (in dollars per share)     $ 1.00    
Preferred shares, issued shares (in shares)     500,000    
Preferred Stock, dividend rate (in percent)     8.00%    
Preferred stock right of shareholder (in shares)     400,000    
Preferred stock, right to shareholder value of redeemed stock     $ 400