Note 7 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

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

		Year Ended December 31,
		2022				2021				2020
Cost of revenue		$	4,721			$	3,543			$	2,592
Research and development			35,355				26,030				20,033
Selling, general and administrative			120,916				93,906				62,926
Total stock-based compensation expense		$	160,992			$	123,479			$	85,551
Tax benefit related to stock-based compensation (1)		$	2,498			$	1,760			$	1,855

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 Grant									Average Grant								Average Grant								Average Grant
						Date Fair									Date Fair								Date Fair								Date Fair
		*Number of*				*Value Per*				*Number of*					*Value Per*				*Number of*				*Value Per*				*Number of*				*Value Per*
		*Shares*				*Share*				*Shares*					*Share*				*Shares*				*Share*				*Shares*				*Share*
Outstanding at January 1, 2020			180			$	115.45				1,987				$	74.50				1,886			$	37.63				4,053			$	59.16
Granted			76			$	189.28				627	(1)			$	173.40				-			$	-				703			$	175.12
Vested			(86	)		$	110.67				(1,213	)			$	59.03				(324	)		$	23.57				(1,623	)		$	54.70
Forfeited			(9	)		$	138.34				(11	)			$	84.48				(8	)		$	68.48				(28	)		$	96.35
Outstanding at December 31, 2020			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

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

		Year Ended December 31,
		2022				2021				2020
Expected term (in years)			0.5				0.5				0.5
Expected volatility			50.6	%			43.2	%			48.9	%
Risk-free interest rate			1.9	%			0.1	%			0.8	%
Dividend yield			0.6	%			0.6	%			0.9	%