Note 6 - Stockholders' Equity and Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Total stock-based compensation expense	$ 5,617	$ 2,982	$ 16,487	$ 6,793
Share-Based Payment Arrangement, Expense	5,617	2,982	16,487	6,793
Time-based Options [Member]
Total stock-based compensation expense	3,937	2,131	11,623	4,609
Share-Based Payment Arrangement, Expense	3,937	2,131	11,623	4,609
Performance-based Options [Member]
Total stock-based compensation expense	0	5	0	27
Share-Based Payment Arrangement, Expense	0	5	0	27
Market-based Options [Member]
Total stock-based compensation expense	1,577	788	4,581	1,978
Share-Based Payment Arrangement, Expense	1,577	788	4,581	1,978
Employee Stock Purchase Plan Award [Member]
Total stock-based compensation expense	103	58	283	179
Share-Based Payment Arrangement, Expense	103	58	283	179
Cost of Sales [Member]
Total stock-based compensation expense	52	0	52	0
Share-Based Payment Arrangement, Expense	52	0	52	0
Research and Development Expense [Member]
Total stock-based compensation expense	2,232	1,108	7,329	3,058
Share-Based Payment Arrangement, Expense	2,232	1,108	7,329	3,058
Selling, General and Administrative Expenses [Member]
Total stock-based compensation expense	3,333	1,874	9,106	3,735
Share-Based Payment Arrangement, Expense	$ 3,333	$ 1,874	$ 9,106	$ 3,735