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Note 7 - Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 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			165				4,694			$	4.63
Authorized			1,435				-				-
Options Granted			(1,178	)			1,178				3.75
RSAs Granted			(244	)			-				-
Exercised			-				(40	)			0.69
Forfeited/expired			62				(62	)			4.31
Balance as of March 31, 2023			240				5,770			$	4.48

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

		For the three months ended March 31, 2023
Description		2023				2022
Dividend-yield			-	%			-	%
Risk-free interest rate			3.82	%			1.66	%
Expected volatility			125.32	%			113.45	%
Expected life (years)			7.00				7.00
Market value per share on grant date		$	3.75			$	11.31
Fair value per option on grant date		$	3.43			$	9.89

X

- Definition

Tabular disclosure of share-based payment arrangement.

+ References

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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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+ References

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-SubTopic 10
-Subparagraph (f)(2)
-Name Accounting Standards Codification
-Paragraph 2
-Section 50
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