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Note 8 - Stock-Based Compensation (Tables)

6 Months Ended

Jun. 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			1,758,000			$	1.35
Exercised			—			$	-
Canceled and forfeited			(815,360	)		$	5.87
Outstanding at June 30, 2025			8,581,098			$	4.62

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

		2025 Grants
Strike price		$0.90 - $1.53
Risk-free rate			4.1% - 4.5%
Expected dividend yield			—
Expected volatility			94.5% - 96.3%
Expected term (in years)			6
Grant date fair value			$0.70 - $1.21

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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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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