Note 7 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

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

	Year Ended December 31,
	2023		2022		2021
Cost of revenue	$	4,545	$	4,721	$	3,543
Research and development		36,611		35,355		26,030
Selling, general and administrative		108,555		120,916		93,906
Total stock-based compensation expense	$	149,711	$	160,992	$	123,479
Tax benefit related to stock-based compensation (1)	$	2,519	$	2,498	$	1,760

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, 2021		161		$	151.62		1,390			$	132.60		1,554		$	40.40		3,105		$	87.42
Granted		46		$	384.33		365		(1)	$	354.12		-		$	-		411		$	357.49
Vested		(71	)	$	144.46		(577	)		$	91.50		(324	)	$	23.57		(972	)	$	72.69
Forfeited		(11	)	$	207.04		(12	)		$	103.84		(12	)	$	68.48		(35	)	$	124.50
Outstanding at December 31, 2021		125		$	235.82		1,166			$	222.78		1,218		$	44.59		2,509		$	136.87
Granted		49		$	390.89		35		(1)(2)	$	385.80		917		$	199.63		1,001		$	215.63
Vested		(61	)	$	193.18		(452	)		$	147.78		(324	)	$	23.57		(837	)	$	103.02
Forfeited		(7	)	$	316.00		(1	)		$	377.86		(6	)	$	216.37		(14	)	$	275.47
Outstanding at December 31, 2022		106		$	327.13		748			$	275.70		1,805		$	126.57		2,659		$	176.50
Granted		51		$	472.38		281		(1)	$	449.38		31		$	330.95		363		$	444.86
Vested		(49	)	$	296.65		(543	)		$	257.24		(319	)	$	23.57		(911	)	$	177.54
Forfeited		(6	)	$	387.61		(4	)		$	315.19		(15	)	$	110.65		(25	)	$	209.23
Outstanding at December 31, 2023		102		$	411.11		482			$	397.77		1,502		$	152.89		2,086		$	222.04

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

	Year Ended December 31,
	2023			2022			2021
Expected term (in years)		0.5			0.5			0.5
Expected volatility		53.3	%		50.6	%		43.2	%
Risk-free interest rate		5.3	%		1.9	%		0.1	%
Dividend yield		0.8	%		0.6	%		0.6	%