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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

​