Note 6 - Leases - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Operating lease right-of-use assets, net	$ 1,474	$ 590
Current lease liabilities	1,093	596
Non-current leases	465	0
Lease liabilities	1,558	596
Office Leases [Member]
Operating lease right-of-use assets, net	1,474	590
Current lease liabilities	1,093	596
Non-current leases	$ 465	$ 0