Note 3 - Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2024

Notes Tables

Share-Based Payment Arrangement, Cost by Plan [Table Text Block]

	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023
Cost of revenue	$	1,576	$	1,020	$	4,585	$	3,317
Research and development		11,331		8,479		33,460		26,406
Selling, general and administrative (“SG&A”)		38,491		24,103		111,585		78,880
Total stock-based compensation expense	$	51,398	$	33,602	$	149,630	$	108,603
Tax benefit related to stock-based compensation (1)	$	766	$	667	$	2,272	$	1,753

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

	Time-Based RSUs					PSUs and MPSUs						MSUs					Total
				Weighted-						Weighted-					Weighted-					Weighted-
				Average						Average					Average					Average
				Grant Date						Grant Date					Grant Date					Grant Date
	Number of			Fair Value		Number of				Fair Value		Number of			Fair Value		Number of			Fair Value
	Shares			Per Share		Shares				Per Share		Shares			Per Share		Shares			Per Share
Outstanding at January 1, 2024		102		$	411.11		482			$	397.77		1,502		$	152.89		2,086		$	222.04
Granted		31		$	643.98		344		(1)	$	593.33		-		$	-		375		$	597.56
Vested		(39	)	$	374.15		(150	)		$	272.21		(563	)	$	68.48		(752	)	$	125.04
Forfeited		(4	)	$	471.15		(1	)		$	400.96		(1	)	$	270.15		(6	)	$	419.22
Outstanding at September 30, 2024		90		$	505.64		675			$	525.43		938		$	203.32		1,703		$	346.88

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

	Three Months Ended September 30,						Nine Months Ended September 30,
	2024			2023			2024			2023
Expected term (in years)		0.5			0.5			0.5			0.5
Expected volatility		47.8	%		50.8	%		45.1	%		53.3	%
Risk-free interest rate		5.0	%		5.5	%		5.2	%		5.3	%
Dividend yield		0.6	%		0.8	%		0.6	%		0.8	%