Note 10 - Stockholders' Equity - Stock-based Compensation Expense 2 (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Share-based compensation expense	$ 2,021	$ 1,673	$ 5,870	$ 5,327
Share-Based Payment Arrangement, Option [Member] \| Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost
Share-based compensation expense	55	31	164	124
Share-Based Payment Arrangement, Option [Member] \| Location, Statement of Income, Balance [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense
Share-based compensation expense	250	236	745	781
Restricted Stock Units (RSUs) [Member] \| Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost
Share-based compensation expense	676	591	2,098	1,925
Restricted Stock Units (RSUs) [Member] \| Location, Statement of Income, Balance [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense
Share-based compensation expense	$ 1,040	$ 815	$ 2,863	$ 2,497