Note 3 - Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2023

Notes Tables

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
Cost of revenue	$	1,150	$	1,198	$	2,297	$	2,505
Research and development		9,313		9,187		17,927		17,588
Selling, general and administrative		27,529		32,530		54,777		62,633
Total stock-based compensation expense	$	37,992	$	42,915	$	75,001	$	82,726
Tax benefit related to stock-based compensation (1)	$	663	$	652	$	1,086	$	1,225

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		38		$	467.77		230	(1)	$	449.23		-		$	-		268		$	450.48
Vested		(35	)	$	277.81		(298	)	$	294.82		(162	)	$	23.57		(495	)	$	204.90
Forfeited		(3	)	$	365.67		(2	)	$	287.76		(5	)	$	139.15		(10	)	$	236.17
Outstanding at June 30, 2023		106		$	392.85		678		$	327.00		1,638		$	136.72		2,422		$	201.23

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

	Six Months Ended June 30,
	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	%