Note 9 - Stock-based Compensation - Schedule of Stock Based Compensation 2 (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
stock compensation expense	$ 118	$ 644	$ 875	$ 2,828
Disaggregation of Income Statement Expense, Caption, Identifier [Axis]: us-gaap:GeneralAndAdministrativeExpense
stock compensation expense	63	280	417	1,547
Disaggregation of Income Statement Expense, Caption, Identifier [Axis]: us-gaap:ResearchAndDevelopmentExpense
stock compensation expense	14	154	129	573
Disaggregation of Income Statement Expense, Caption, Identifier [Axis]: us-gaap:SellingAndMarketingExpense
stock compensation expense	$ 41	$ 210	$ 329	$ 708