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Note 8 - Share-based Compensation (Tables)

3 Months Ended

Mar. 31, 2025

Notes Tables

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

		Three months ended
		March 31,
		2025				2024
Research and development		$	95			$	115
Selling, general and administrative			75				89
Total share-based compensation		$	170			$	204

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)
Balance, December 31, 2024			168,184			$	47.97				6.6			$	—
Balance, March 31, 2025			168,184			$	47.97				6.3			$	—
Exercisable, March 31, 2025			127,826			$	58.07				5.7			$	—

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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