v3.26.3
Note 7 - Fair Value of Financial Instruments (Tables)
6 Months Ended
Jun. 30, 2026
Notes Tables  
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]

​

​

​June 30,
2026

​

Issuance
Dates

​

​

​

​

​

​

​

​

​

​

​

Term, in years

​

​

0.50

​-

1.58

​

​

0.91

-

1.50

Expected volatility

​

​

​

132.9%​

​

​

​

105.6

-

​123.9%

Risk-free interest rate

​

​

3.90

​-

3.99%

​

​

3.45

-

​3.65%

Expected dividend yield

​

​

​

​0.0%

​

​

​

​

0.0%

​

Continuous discount rate

​

​

21.17

​-

21.92%

​

​

14.21

-

​16.85%

Discount factor

​

​

0.72

​-

0.98

​

​

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

​

​

1,129,180

​

Value of derivative settled upon conversion of notes

​

​

(257,415

)

Change in fair value of derivative liability

​

​

89,816

​

Derivative liability as of June 30, 2026

​

$

1,368,947

​