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Note 3 - Investments in Debt Securities (Tables)
6 Months Ended
Jun. 30, 2025
Notes Tables  
Debt Securities, Held-to-Maturity [Table Text Block]
  

June 30,

  

December 31,

 
  

2025

  

2024

 
  

(unaudited)

  

(audited)

 
  

(in thousands)

 

Amortized cost

 $492  $2,687 

Unrealized gains

  -   5 

Fair value

 $492  $2,692 
Investments Classified by Contractual Maturity Date [Table Text Block]
  

June 30, 2025

(unaudited)

  

December 31, 2024

(audited)

 
      

(in thousands)

     
  

Amortized

Cost

  

Fair Value

  

Amortized

Cost

  

Fair Value

 

One year or less

 $492  $492  $2,687  $2,692 

Greater than one year through five years

  -   -   -   - 
  $492  $492  $2,687  $2,692