Note 3 - Stock-based Compensation - RSU Summary (Details) shares in Thousands	3 Months Ended
	Mar. 31, 2025 $ / shares shares
Time-Based RSUs [Member]
Balance (in shares) | shares	85
Outstanding, weighted average (in dollars per share) | $ / shares	$ 516.12
Granted (in shares) | shares	23
Granted, weighted average (in dollars per share) | $ / shares	$ 656.29
Vested (in shares) | shares	(11)
Vested, weighted average (in dollars per share) | $ / shares	$ 490.4
Forfeited (in shares) | shares	(2)
Forfeited, weighted average (in dollars per share) | $ / shares	$ 566.81
Balance (in shares) | shares	95
Outstanding, weighted average (in dollars per share) | $ / shares	$ 552.28
PSUs and MPSUs [Member]
Balance (in shares) | shares	681
Outstanding, weighted average (in dollars per share) | $ / shares	$ 524.08
Granted (in shares) | shares	247
Granted, weighted average (in dollars per share) | $ / shares	$ 571.17
Vested (in shares) | shares	(34)
Vested, weighted average (in dollars per share) | $ / shares	$ 399.4
Forfeited (in shares) | shares	(3)
Forfeited, weighted average (in dollars per share) | $ / shares	$ 525.65
Balance (in shares) | shares	891
Outstanding, weighted average (in dollars per share) | $ / shares	$ 537.35
MSUs [Member]
Balance (in shares) | shares	938
Outstanding, weighted average (in dollars per share) | $ / shares	$ 203.32
Granted (in shares) | shares	0
Granted, weighted average (in dollars per share) | $ / shares	$ 0
Vested (in shares) | shares	0
Vested, weighted average (in dollars per share) | $ / shares	$ 0
Forfeited (in shares) | shares	(8)
Forfeited, weighted average (in dollars per share) | $ / shares	$ 304.25
Balance (in shares) | shares	930
Outstanding, weighted average (in dollars per share) | $ / shares	$ 202.4
Time-Based RSUs PSUs MSUs [Member]
Balance (in shares) | shares	1,704
Outstanding, weighted average (in dollars per share) | $ / shares	$ 347.01
Granted (in shares) | shares	270
Granted, weighted average (in dollars per share) | $ / shares	$ 576.99
Vested (in shares) | shares	(45)
Vested, weighted average (in dollars per share) | $ / shares	$ 422.57
Forfeited (in shares) | shares	(13)
Forfeited, weighted average (in dollars per share) | $ / shares	$ 391.01
Balance (in shares) | shares	1,916
Outstanding, weighted average (in dollars per share) | $ / shares	$ 375.42