Note 10 - Leases - Lease Costs (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Operating lease cost		$ 71	$ 103	$ 212	$ 358
Short-term lease cost		19	137	130	399
Variable costs	[1]	13	21	44	74
Total lease cost		$ 103	$ 261	$ 386	$ 831

[1] Variable lease expense consists primarily of property taxes, property insurance, and common area or other maintenance costs for the Company’s leases of office space.