Note 10 - Leases - Lease Costs (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Operating lease cost		$ 71	$ 114	$ 141	$ 255
Short-term lease cost		35	137	111	262
Variable costs	[1]	15	24	31	53
Total lease cost		$ 121	$ 275	$ 283	$ 570

[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.