Note 11 - Equity Incentive Plan - Total 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	$ 3,394	$ 3,561	$ 10,875	$ 11,428
Cost of Sales [Member]
Stock-based compensation expense	92	181	391	532
Research and Development Expense [Member]
Stock-based compensation expense	485	304	1,587	1,474
Selling, General and Administrative Expenses [Member]
Stock-based compensation expense	$ 2,817	$ 3,076	$ 8,897	$ 9,422