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Note 3 - Investments in Debt Securities (Tables)
6 Months Ended
Jun. 30, 2024
Notes Tables  
Debt Securities, Held-to-Maturity [Table Text Block]
  

June 30,

  

December 31,

 
  

2024

  

2023

 
  

(unaudited)

  

(audited)

 
  

(in thousands)

 

Amortized cost

 $3,227  $3,135 

Unrealized gains (losses)

  (1)  4 

 

 $3,226  $3,139 
Investments Classified by Contractual Maturity Date [Table Text Block]
  

June 30, 2024

(unaudited)

  

December 31, 2023

(audited)

 
      

(in thousands)

     
  

Amortized

Cost

  

Fair Value

  

Amortized

Cost

  

Fair Value

 

One year or less

 $2,949  $2,948  $2,671  $2,671 

Greater than one year through five years

  278   278   464   468 

 

 $3,227  $3,226  $3,135  $3,139