Note 3 - Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

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

	Three Months Ended March 31,
	2024		2023
Cost of revenue	$	1,398	$	1,147
Research and development		10,447		8,614
Selling, general and administrative (“SG&A”)		34,081		27,248
Total stock-based compensation expense	$	45,926	$	37,009
Tax benefit related to stock-based compensation (1)	$	708	$	423

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		21		$	632.98		240		(1)	$	609.22		-		$	-		261		$	610.67
Vested		(14	)	$	372.30		(57	)		$	287.31		(563	)	$	68.48		(634	)	$	94.76
Forfeited		(2	)	$	467.30		-			$	-		-		$	-		(2	)	$	423.45
Outstanding at March 31, 2024		107		$	458.67		665			$	489.68		939		$	203.38		1,711		$	330.53

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

	Three Months Ended March 31,
	2024			2023
Expected term (in years)		0.5			0.5
Expected volatility		42.4	%		55.8	%
Risk-free interest rate		5.3	%		5.0	%
Dividend yield		0.7	%		0.8	%