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Note 8 - Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2024

Notes Tables

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

						Weighted average
		Number of options				exercise price
Outstanding at December 31, 2023			7,342,883			$	6.31
Granted			1,587,929				2.26
Exercised			(569	)			2.50
Canceled and forfeited			(673,653	)			6.61
Outstanding at September 30, 2024			8,256,590			$	5.51

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

		2024 Grants
Strike price		1.02 - 2.42
Risk-free rate		3.9% - 4.2%
Expected dividend yield		—
Expected volatility		92.1% - 95.1%
Expected term (in years)		6

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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- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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