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

September 30,

  

December 31,

 
  

2024

  

2023

 
  

(unaudited)

  

(audited)

 
  

(in thousands)

 

Amortized cost

 $3,101  $3,135 

Unrealized gains

  9   4 

Fair value

 $3,110  $3,139 
Investments Classified by Contractual Maturity Date [Table Text Block]
  

September 30, 2024 (unaudited)

  

December 31, 2023 (audited)

 
       
  

(in thousands)

 
  

Amortized

Cost

  

Fair Value

  

Amortized

Cost

  

Fair Value

 

One year or less

 $2,982  $2,988  $2,671  $2,671 

Greater than one year through five years

  119   122   464   468 

Fair value

 $3,101  $3,110  $3,135  $3,139