Note 3 - Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2023

Notes Tables

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

	Three Months Ended March 31,
	2023		2022
Cost of revenue	$	1,147	$	1,307
Research and development		8,614		8,401
Selling, general and administrative		27,248		30,103
Total stock-based compensation expense	$	37,009	$	39,811
Tax benefit related to stock-based compensation (1)	$	423	$	573

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

	Time-Based RSUs					PSUs and MPSUs					MSUs					Total
	Number of Shares			Weighted- Average Grant Date Fair Value Per Share		Number of Shares			Weighted- Average Grant Date Fair Value Per Share		Number of Shares			Weighted- Average Grant Date Fair Value Per Share		Number of Shares			Weighted- Average Grant Date Fair Value Per Share
Outstanding at January 1, 2023		106		$	327.13		748		$	275.70		1,805		$	126.57		2,659		$	176.50
Granted		27		$	467.62		246	(1)	$	449.22		-		$	-		273		$	450.13
Vested		(16	)	$	279.89		(198	)	$	291.65		(81	)	$	23.57		(295	)	$	217.47
Forfeited		(2	)	$	361.26		(2	)	$	285.23		(5	)	$	139.15		(9	)	$	225.18
Outstanding at March 31, 2023		115		$	365.93		794		$	326.02		1,719		$	131.39		2,628		$	200.37

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

	Three Months Ended March 31,
	2023			2022
Expected term (in years)		0.5			0.5
Expected volatility		55.8	%		38.1	%
Risk-free interest rate		5.0	%		0.7	%
Dividend yield		0.8	%		0.6	%