Note 5 - Debt and Warrants Transactions (Tables)

3 Months Ended

Mar. 31, 2026

Notes Tables

Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]

Notes Warrants	March 31, 2026			December 31, 2025
Common stock market price	$	0.72		$	0.54
Risk-free interest rate		3.7	%		3.5	%
Expected dividend yield		—			—
Expected term (in years)		1.36			1.61
Expected volatility		98.7	%		119.9	%

Additional Warrants	March 31, 2026			December 31, 2025
Common stock market price	$	0.72		$	0.54
Risk-free interest rate		3.7	%		3.5	%
Expected dividend yield		—			—
Expected term (in years)		1.87			2.12
Expected volatility		116.1	%		116.0	%