Note 10 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2022
Effective Income Tax Rate Reconciliation, Percent, Total	(0.30%)	(0.20%)	(0.40%)	(0.00%)
Income Tax Expense (Benefit), Total	$ 55	$ 32	$ 224	$ (4)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	$ 0		$ 0
Forecast [Member]
Effective Income Tax Rate Reconciliation, Percent, Total					(0.40%)