Note 8 - Cash, Cash Equivalents and Investments (Tables)

3 Months Ended

Mar. 31, 2026

Notes Tables

Fair Value, by Balance Sheet Grouping [Table Text Block]

	March 31,		December 31,
	2026		2025
Cash	$	932,144	$	969,628
Money market funds		130,786		129,674
Certificates of deposit		304,179		157,243
Auction-rate securities backed by student-loan notes		49		49
Total	$	1,367,158	$	1,256,594

	March 31,		December 31,
	2026		2025
Reported as:
Cash and cash equivalents	$	1,062,930	$	1,099,302
Short-term investments		304,179		157,243
Investment within other long-term assets		49		49
Total	$	1,367,158	$	1,256,594

Investments Classified by Contractual Maturity Date [Table Text Block]

	Amortized Cost		Fair Value
Due in less than 1 year	$	202,786	$	202,786
Due in 1 - 5 years		101,393		101,393
Due in greater than 5 years		50		49
Total	$	304,229	$	304,228