Note 9 - Income Tax Expense (Benefit) - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Reductions due to lapse of statute of limitations	$ (200)
Excluding Interest and Penalties [Member]
Balance at the beginning of year	801	$ 993
Additions based on tax positions related to the current year	0	94
Additions for tax positions of prior years	129	23
Reductions due to lapse of statute of limitations	(123)	(309)
Balance at the end of year	$ 807	$ 801