Note 9 - Commitments and Contingencies - Supplemental Lease Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Right-of-use asset, net and lease liabilities (in thousands)	$ 3,270		$ 3,270		$ 2,003
Lease expense	$ 362	$ 343	$ 659	$ 674
Weighted average remaining lease term (years) (Year)	3 years 6 months		3 years 6 months		2 years 9 months 18 days
Weighted average discount rate	6.20%		6.20%		3.40%
Cost of Sales [Member]
Lease expense	$ 209	187	$ 385	370
General and Administrative Expense [Member]
Lease expense	121	115	238	223
Research and Development Expense [Member]
Lease expense	$ 32	$ 41	$ 36	$ 81