Note 9 - Stock-Based Compensation - Summary of Compensation Costs Related to Stock-Based Compensation Awards (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Allocated share based compensation expense	$ 633	$ 715	$ 1,279	$ 1,524
Cost of Sales [Member]
Allocated share based compensation expense	47	68	110	173
Selling, General and Administrative Expenses [Member]
Allocated share based compensation expense	476	526	949	1,079
Research and Development Expense [Member]
Allocated share based compensation expense	$ 110	$ 121	$ 220	$ 272