Note 3 - Shareholders' Equity - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Stock-based compensation expense	$ 367	$ 68	$ 986	$ 608
Selling and Marketing Expense [Member]
Stock-based compensation expense	31	(20)	83	25
General and Administrative Expense [Member]
Stock-based compensation expense	336	88	903	583
Share-Based Payment Arrangement, Option [Member]
Stock-based compensation expense	175	68	523	399
Warrant [Member]
Stock-based compensation expense	18	0	18	0
Common Stock Award [Member]
Stock-based compensation expense	0	0	0	17
Restricted Stock [Member]
Stock-based compensation expense	$ 174	$ 0	$ 445	$ 192