Note 6 - Leases - Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Operating lease expense	$ 300	$ 221	$ 609	$ 378
Short-term lease expense	25	69	53	131
Total lease expense	325	290	662	509
Cash flows from operating activities			593	288
In exchange for new operating lease liabilities during the period			0	1,332
Office Leases [Member]
Operating lease expense	$ 300	$ 221	$ 609	$ 378