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Note 9 - Long-term Investments (Tables)
9 Months Ended
Sep. 30, 2025
Notes Tables  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

September 30, 2025

    

Balance, beginning of period

 $1,200,000 

Transfer in

  - 

Unrealized loss

  (44,000)

Ending balance

  1,156,000 

Amount of unrealized loss for the period included in income relating to assets held at the end of the reporting period

  (44,000)

December 31, 2024

    

Balance, beginning of period

 $- 

Transfer in

  1,200,000 

Unrealized loss

  - 

Ending balance

  1,200,000 

Amount of unrealized loss for the period included in income relating to assets held at the end of the reporting period

  -