Note 7 - Commitments and Contingencies - Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Weighted-average remaining lease term (Year)	3 years 7 months 9 days	4 years 6 months 3 days
Weighted-average discount rate	6.20%	6.20%
Operating lease cost	$ 1,752	$ 1,779
Cash paid for amounts included in the measurement of lease liabilities	$ 1,764	$ 1,753