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Note 12 - Equity Incentive Plan (Tables)

9 Months Ended

Sep. 30, 2022

Notes Tables

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

		Three Months Ended September 30,								Nine Months Ended September 30,
		2022				2021				2022				2021
Cost of revenue		$	242			$	142			$	645			$	485
Research & development			397				360				1,267				1,003
Selling, general & administrative			3,237				2,361				8,590				6,431
Total stock-based compensation expense		$	3,876			$	2,863			$	10,502			$	7,919

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

		Number of Options				Weighted Average Exercise Price				Weighted Average Remaining Contractual Term (in years)				Aggregate Intrinsic Value (in thousands)
Outstanding as of December 31, 2021			1,175,993			$	39.56
Granted			486,901			$	27.60
Exercised			(437	)		$	9.10							$	10
Forfeited and canceled			(156,672	)		$	44.08
Outstanding as of September 30, 2022			1,505,785			$	35.21				8.3			$	78
Vested, September 30, 2022			499,617			$	40.00				7.3			$	8
Vested or expected to vest, September 30, 2022			1,505,785			$	35.21				8.3			$	78

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

	Nine Months Ended September 30,
	2022				2021
Risk free interest rate		1.3%	-	3.4%		0.3%	-	0.7%
Expected volatility		53.8%	-	55.5%		54.8%	-	56.1%
Expected life (years)			4.5				4.0
Expected dividend yield			0.0%				0.0%
Fair value per option			$11.26				$14.55

Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

		Number of Shares				Weighted Average Fair Value
Outstanding as of December 31, 2021			412,658			$	36.33
Granted			507,524			$	25.14
Vested			(159,871	)		$	36.48
Forfeited and cancelled			(67,389	)		$	32.45
Outstanding as of September 30, 2022			692,922			$	28.48

Schedule of Nonvested Performance-Based Units Activity [Table Text Block]

		Number of Shares				Weighted Average Fair Value
Outstanding as of December 31, 2021			158,297			$	37.44
Performance factor adjustment			2,125			$	32.53
Vested			(19,125	)		$	32.53
Forfeited and cancelled			(23,400	)		$	41.86
Outstanding as of September 30, 2022			117,897			$	34.98

X

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