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Note 8 - Share-based Compensation (Tables)

3 Months Ended

Mar. 31, 2026

Notes Tables

Schedule of Share-based Compensation, Expense [Table Text Block]

		Three months ended
		March 31,
		2026				2025
Research and development		$	55			$	95
Selling, general and administrative			58				75
Total share-based compensation		$	113			$	170

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

		Number of shares				Weighted average exercise price				Weighted average remaining contractual term (years)				Aggregate intrinsic value (in thousands)
Outstanding, December 31, 2025			485,203			$	17.19				8.4			$	—
Stock options granted			30,000				1.29
Stock options forfeited			(10,193	)			9.94
Outstanding, March 31, 2026			505,010			$	16.39				8.3			$	—
Exercisable, March 31, 2026			157,036			$	48.34				5.3			$	—

X

- Definition

Tabular disclosure of the components of the allocated share-based compensation expense.

+ References

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- Definition

Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

+ References

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