Note 13 - Stockholders' Equity - Stock-Based Compensation Expense Including Options and Restricted Stock by Category (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Allocated share-based compensation expense	$ 1,316	$ 1,686
Cost of Sales [Member]
Allocated share-based compensation expense	2	3
Engineering and Product Development [Member]
Allocated share-based compensation expense	222	220
Selling and Marketing Expense [Member]
Allocated share-based compensation expense	308	518
General and Administrative Expense [Member]
Allocated share-based compensation expense	$ 784	$ 945