Note 9 - Fair Value Measurements - Schedule of Financial Assets and Liabilities Measured on a Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Money market funds	$ 271,370	$ 282,121
Equity securities	8,450	49,655
Common stock options	3	3
Forward contracts	155
Total assets	279,978	331,779
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Money market funds	271,370	282,121
Equity securities	8,450	49,655
Common stock options	0	0
Total assets	279,820	331,776
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Money market funds	0	0
Equity securities	0	0
Common stock options	3	3
Forward contracts	155
Total assets	158	3
Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Money market funds	0	0
Equity securities	0	0
Common stock options	0	0
Total assets	$ 0	$ 0