v3.26.3
Note 7 - Fair Value of Financial Instruments (Tables)
3 Months Ended
Mar. 31, 2026
Notes Tables  
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]

​

​March 31,
2026

​

​

Issuance
Dates

​

​

​

​

​

​

​

​

​

Term, in years

0.75

​-

1.83

​

​

0.91

-

1.50

Expected volatility

104.1

​-

104.1%

 

​

110.2

-

​123.9%

Risk-free interest rate

3.61

​-

3.70%

​

​

3.45

-

​3.49%

Expected dividend yield

0.0%

​-

0.0%

 

​

0.0%

-

​0.0%

Continuous discount rate

15.18

​-

15.42%

​

​

14.21

-

​16.85%

Discount factor

0.93

​-

0.97

​

​

0.81

-

0.96

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

Derivative liability as of December 31, 2025

​

$

407,366

​

Value of derivative upon issuance of White Lion Notes

​

​

624,664

​

Value of derivative settled upon conversion of notes

​

​

(257,415

)

Change in fair value of derivative liability

​

​

438,637

​

Derivative liability as of March 31, 2026

​

$

1,213,252

​