Note 13 - Stockholders' Equity - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Stock-based compensation expense	$ 2,737	$ 2,534
Cost of Sales [Member]
Stock-based compensation expense	217	130
Research and Development Expense [Member]
Stock-based compensation expense	48	57
General and Administrative Expense [Member]
Stock-based compensation expense	$ 2,472	$ 2,347