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Note 10 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2024

Notes Tables

Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block]

		Shares Available for Grant				Number of Shares Outstanding				Weighted-Average Exercise Price
Balance as of December 31, 2022			65				4,694			$	4.63
Authorized			1,644				-				-
Options Granted			(1,278	)			1,278				3.60
RSAs Granted			(244	)			-				-
Exercised			-				(177	)			1.83
Forfeited/expired			269				(269	)			5.93
Balance as of December 31, 2023			456				5,526			$	4.42
Authorized			1,740				-				-
Options Granted			(1,776	)			1,776				3.10
RSAs Granted			(428	)			-				-
Exercised			-				(15	)			2.56
Forfeited/expired			86				(86	)			6.89
Balance as of December 31, 2024			78				7,201			$	4.06

Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Table Text Block]

		Number of Shares				Weighted Average Exercise Price				Remaining Contractual Term (In Years)				Aggregate Intrinsic Value1
2024
Vested and Exercisable			5,245			$	4.17				6.08			$	4,021
Unvested			1,955				3.80				8.68				47
Total			7,201			$	4.06				7.55			$	4,068
2023
Vested and Exercisable			3,986			$	3.58				6.47			$	11,695
Unvested			1,540				6.55				8.67				1,621
Total			5,526			$	4.42				7.04			$	13,316

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

Description		For the year ended December 31,
		2024				2023
Dividend-yield			0	%			0	%
Risk-free interest rate			3.93	%			3.86	%
Expected volatility			115.41	%			124.62	%
Expected life (years)			5.81				7.00
Market value per share on grant date		$	3.10			$	3.60
Fair value per share on grant date		$	2.65			$	3.29

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Tabular disclosure of share-based payment arrangement.

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-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-SubTopic 10
-Topic 718
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-1

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