Note 6 - Leases - Lease Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Operating lease expense	$ 887	$ 627
Short-term lease expense	232	278
Total lease expense	1,119	905
Cash flows from operating activities	678	624
In exchange for new operating lease liabilities during the period	1,640	712
Office Leases [Member]
Operating lease expense	$ 887	$ 627