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Series B and Series B-2 Preferred Stock (Details)
$ / shares in Units, $ in Thousands
 2 Months Ended 12 Months Ended
Apr. 30, 2014
USD ($)
$ / shares
shares
Oct. 31, 2025
vote
$ / shares
shares
Oct. 31, 2024
$ / shares
shares
Oct. 31, 1997
$ / shares
shares
Series B Preferred Stock        
Temporary Equity [Line Items]        
Convertible preferred stock, shares issued (in shares) | shares   14,790 14,790 30,000
Convertible preferred stock, par value (in dollars per share)   $ 100.00 $ 100.00 $ 100.00
Convertible preferred stock, dividend rate   8.75% 8.75%  
Number of votes | vote   10    
Convertible preferred stock, shares outstanding (in shares) | shares   14,790 14,790  
Conversion price (in dollars per share)   $ 8.00    
Series B-2 Convertible Preferred Stock        
Temporary Equity [Line Items]        
Convertible preferred stock, shares issued (in shares) | shares 9,300 9,300 9,300  
Convertible preferred stock, par value (in dollars per share) $ 100.00 $ 100.00 $ 100.00  
Convertible preferred stock, dividend rate 4.00% 4.00% 4.00%  
Number of votes | vote   1    
Convertible preferred stock, shares outstanding (in shares) | shares   9,300 9,300  
Conversion price (in dollars per share)   $ 15.00    
Issuance of preferred stock | $ $ 9,300      
Conversion term   30 days    
Convertible preferred stock, liquidation preference per share (in dollars per share)   $ 1,000 $ 1,000