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Note 5 - Investments (Tables)
9 Months Ended
Sep. 30, 2023
Notes Tables  
Condensed Cash Flow Statement [Table Text Block]
  

September 30,
2023

  

September 30,
2022

 

Interest earned:

        

Short term investments and cash and cash equivalents

 $1,122  $1,452 

Net investment income

 $1,122  $1,452 
  

September 30,
2023

  

September 30,
2022

 

Interest earned:

        

Short term investments and cash and cash equivalents

 $352  $1,400 

Net investment income

 $352  $1,400