Note 9 - Fair Value Measurements - Schedule of Financial Assets and Liabilities Measured on a Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Money market funds	$ 131,109	$ 282,121
Equity securities	8,125	49,655
Common stock options	3	3
Total assets	139,237	331,779
Forward contracts	180
Total liabilities	180
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Money market funds	131,109	282,121
Equity securities	8,125	49,655
Common stock options	0	0
Total assets	139,234	331,776
Forward contracts	0
Total liabilities	0
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
Total assets	3	3
Forward contracts	180
Total liabilities	180
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
Forward contracts	0
Total liabilities	$ 0