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Note 9 - Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

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, 2020			380				5,327			$	1.14
Authorized			816				-				-
Options Granted			(1,141	)			1,141				5.60
RSAs Granted			(154	)			-				-
Exercised			-				(2,498	)			1.39
Forfeited/expired			241				(207	)			1.84
Balance as of December 31, 2021			142				3,763			$	2.29
Authorized			1,338				-				-
Options Granted			(1,307	)			1,307				10.97
RSAs Granted			(89	)			-				-
Exercised			-				(295	)			0.93
Forfeited/expired			81				(81	)			11.63
Balance as of December 31, 2022			165				4,694			$	4.63

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
2022
Vested and Exercisable			3,170			$	2.46				6.98			$	7,419
Unvested			1,524				9.13				8.81				647
Total			4,694			$	4.63				7.58			$	8,066
2021
Vested and Exercisable			2,346			$	1.32				7.68			$	25,771
Unvested			1,417				3.89				8.64				12,961
Total			3,763			$	2.29				8.04			$	38,732

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

Description		For the year ended December 31,
		2022				2021
Dividend-yield			0	%			0	%
Risk-free interest rate			2.03	%			0.83	%
Expected volatility			117.21	%			100.47	%
Expected life (years)			7.00				6.59
Market value per share on grant date		$	10.97			$	5.60
Fair value per share on grant date		$	9.71			$	4.68

X

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Tabular disclosure of share-based payment arrangement.

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-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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