Note 5 - Debt and Warrants Transactions (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

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

Notes Warrants	September 30, 2025			December 31, 2024
Common stock market price	$	0.72		$	1.31
Risk-free interest rate		3.6	%		4.2	%
Expected dividend yield		—			—
Expected term (in years)		1.86			2.61
Expected volatility		121.7	%		105.9	%

Additional Warrants	September 30, 2025			December 31, 2024
Common stock market price	$	0.72		$	1.31
Risk-free interest rate		3.6	%		4.3	%
Expected dividend yield		—			—
Expected term (in years)		2.37			3.12
Expected volatility		115.7	%		99.6	%