Note 1 - Business Description and Significant Accounting Policies - Schedule of Inventory (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Beginning balance, inventory	$ 882	$ 930
Beginning balance, reserve	(882)	(691)
Purchases, inventory	50	163
Sales, inventory	(82)	(211)
Sales, reserve	33	0
Reserve adjustments, reserve	(1)	(191)
Ending balance, inventory	850	882
Ending balance, reserve	$ (850)	$ (882)