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Note 11 - Equity Incentive Plan (Tables)

3 Months Ended

Mar. 31, 2021

Notes Tables

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

		Three Months Ended March 31,
		2021				2020
Risk free interest rate		0.3%	-	0.6%		0.4%	-	1.6%
Expected volatility		54.8%	-	55.4%		46.5%	-	49.4%
Expected life (years)			4.0				4.0
Expected dividend yield			0.0%				0.0%

Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

		Three Months Ended March 31,
		2021				2020
Cost of revenue		$	129			$	146
Research and development			241				196
Selling, general and administrative			1,889				(549	)
Total stock-based compensation expense		$	2,259			$	(207	)

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

		Three Months Ended March 31,
		2021				2020
Grants:
Stock options			421,463				210,775
RSUs			258,417				100,631
PSUs			-				57,400
Exercises:
Stock options			125				-
Forfeitures:
Stock options			73,156				33,478
RSAs			-				8,574
RSUs			4,092				63,683
PSUs			2,500				63,000
Expirations:
Stock options			2,667				363

X

- Definition

Tabular disclosure of share-based payment arrangement.

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