Note 12 - Stockholders' Equity - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Stock-based compensation expense	$ 2,275	$ 2,737
Cost of Sales [Member]
Stock-based compensation expense	32	217
Research and Development Expense [Member]
Stock-based compensation expense	150	48
General and Administrative Expense [Member]
Stock-based compensation expense	$ 2,093	$ 2,472