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Short-term Investments
9 Months Ended
Jul. 31, 2021
Investments, Debt and Equity Securities [Abstract]  
Short-term Investments
Note 3
Short-term Investments
The following is a summary of short-term investments (available for sale):
 
     July 31, 2021  
     Cost      Gross
Unrealized
Gains
     Gross
Unrealized
Losses
     Estimated
Fair Value
 
Equity securities in a public company
   $ 167,930      $ 394,340      $      $ 562,270  
    
 
 
    
 
 
    
 
 
    
 
 
 
 
     October 31, 2020  
     Cost      Gross
Unrealized
Gains
     Gross
Unrealized
Losses
     Estimated
Fair Value
 
Equity securities in a public company
   $ 167,930      $ 191,030      $ —        $ 358,960  
    
 
 
    
 
 
    
 
 
    
 
 
 
The fair values were estimated based on quoted market prices in active markets at each respective period end.