Note 9 - Commitments and Contingencies - Supplemental Lease Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Right-of-use asset, net and lease liabilities (in thousands)	$ 3,049		$ 3,049		$ 2,003
Lease expense	$ 362	$ 331	$ 1,021	$ 1,005
Weighted average remaining lease term (years) (Year)	3 years 4 months 24 days		3 years 4 months 24 days		2 years 9 months 18 days
Weighted average discount rate	6.40%		6.40%		3.40%
Cost of Sales [Member]
Lease expense	$ 209	187	$ 594	557
General and Administrative Expense [Member]
Lease expense	121	116	359	339
Research and Development Expense [Member]
Lease expense	$ 32	$ 28	$ 68	$ 109