Note 6 - Debt and Warrants Transactions (Tables)

12 Months Ended

Dec. 31, 2025

Notes Tables

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

	Notes Warrants						Additional Warrants
	December 31, 2025			December 31, 2024			December 31, 2025			December 31, 2024
Common stock market price	$	0.54		$	1.31		$	0.54		$	1.31
Risk-free interest rate		3.5	%		4.2	%		3.5	%		4.3	%
Expected dividend yield		—			—			—			—
Expected term (in years)		1.61			2.61			2.12			3.12
Expected volatility		119.9	%		105.9	%		116.0	%		99.6	%