Note 5 - Leases - Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Operating lease expense	$ 230	$ 156	$ 608	$ 470
Short-term lease expense	69	84	200	208
Total lease expense	299	240	808	678
Cash flows from operating activities			684	509
In exchange for new operating lease liabilities during the period			1,332	712
Office Leases [Member]
Operating lease expense	$ 230	$ 156	$ 608	$ 470