Note 5 - Warrant liability (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

Schedule of Derivative Liabilities at Fair Value [Table Text Block]

	Common Share
	Purchase
($ in thousands)	Warrants
Balance at January 1, 2025	$	1
Change in fair value of warrant derivative liability		(1	)
Balance at September 30, 2025	$	—

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

							September 2023
	April 2023			July 2023			Inducement
	Warrants			Warrants			Warrants
Initial exercise price	$	600.00		$	600.00		$	600.00
Stock price on valuation date	$	1.58		$	1.58		$	1.58
Risk-free rate		3.68	%		3.68	%		3.68	%
Term (in years)		2.5			2.8			3.4
Rounded annual volatility		124	%		124	%		124	%