Note 10 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2022
Effective Income Tax Rate Reconciliation, Percent, Total	(0.40%)	0.00%	(0.40%)	0.10%
Income Tax Expense (Benefit), Total	$ 85	$ 2	$ 169	$ (36)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	$ 0		$ 0
Forecast [Member]
Effective Income Tax Rate Reconciliation, Percent, Total					(0.40%)