Note 5 - Leases - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Operating lease right-of-use assets, net	$ 1,257	$ 590
Current lease liabilities	963	596
Non-current leases	364	0
Lease liabilities	1,327	596
Office Leases [Member]
Operating lease right-of-use assets, net	1,257	590
Current lease liabilities	963	596
Non-current leases	$ 364	$ 0