Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Fair Value Measurement (Details Textual)

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Note 4 - Fair Value Measurement (Details Textual) - $ / shares
 3 Months Ended
Jan. 31, 2023
Oct. 31, 2022
Dec. 06, 2018
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 11.50   $ 11.50
Public Warrants [Member]      
Class of Warrant or Right, Outstanding (in shares) 13,017,677 13,017,677  
Private Warrants [Member]      
Class of Warrant or Right, Outstanding (in shares) 0 0  
Warrant To Purchase Class A Common Stock [Member]      
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) 1    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 11.50    
Class of Warrant or Right, Redemption Price (in dollars per share) 0.01    
Class of Warrant or Right, Redemption, Common Stock Price Trigger (in dollars per share) $ 18.00    
Class of Warrant or Right, Redemption, Trading Period (Day) 20 days    
Class of Warrant or Right, Redemption, Trading Period Maximum (Day) 30 days