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Note 7 - Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2023

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			-				(141	)			1.63
Forfeited/expired			221				(221	)			5.58
Balance as of September 30, 2023			408				5,610			$	4.43

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

		For the nine months ended September 30,
Description		2023				2022
Dividend-yield			-				-
Risk-free interest rate			3.86	%			2.03	%
Expected volatility			124.62	%			117.21	%
Expected life (years)			7.00				7.00
Market value per share on grant date		$	3.60			$	10.97
Fair value per option on grant date		$	3.29			$	9.71

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- Definition

Tabular disclosure of share-based payment arrangement.

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-Name Accounting Standards Codification
-Section 50
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-SubTopic 10
-Topic 718
-Publisher FASB
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