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Note 8 - Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

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

						Weighted average
		Number of options				exercise price
Outstanding at December 31, 2024			7,638,458			$	5.50
Granted			1,858,000			$	1.38
Exercised			(25,592	)		$	1.91
Canceled and forfeited			(1,143,921	)		$	4.94
Outstanding at September 30, 2025			8,326,945			$	4.67

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

		2025 Grants
Strike price		$0.90 - $1.85
Risk-free rate			3.9% - 4.5%
Expected dividend yield			—
Expected volatility			94.5% - 98.1%
Expected term (in years)			6
Grant date fair value			$0.70 - $1.47

X

- 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.

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