Note 5 - Leases - Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating lease expense	$ 309	$ 157
Short-term lease expense	28	62
Total lease expense	337	219
Cash flows from operating activities	290	173
Office Leases [Member]
Operating lease expense	$ 309	$ 157