Note 13 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Lessee, Operating Lease, Monthly Rent Payments	$ 1
Operating Lease, Expense	8	$ 5
Operating Lease, Liability, Total	0		$ 0
Operating Lease, Right-of-Use Asset	$ 0		$ 0