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Note 7 - Fair Value of Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2025
Notes Tables  
Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]

Level 3

 

December 31, 2025

 

 

December 31, 2024

 

Notes Warrants

 

$

41

 

 

$

197

 

Additional Warrants

 

 

4

 

 

 

27

 

Total

 

$

45

 

 

$

224

 

Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

Notes Warrants

Additional Warrants

Total

Measurement at December 31, 2023

$

334

$

263

$

597

Change in Fair Value

(137

)

(236

)

(373

)

Measurement at December 31, 2024

197

27

224

Change in Fair Value

(156

)

(23

)

(179

)

Measurement at December 31, 2025

$

41

$

4

$

45