Note 5 - Accumulated Other Comprehensive Loss - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Balance		$ 43,650	$ 44,583	$ 44,841	$ 46,200
Balance		44,088	44,832	44,088	44,832
AOCI Attributable to Parent [Member]
Balance		(1,690)	(1,896)	(1,728)	(1,604)
Foreign currency translation adjustments (1)	[1]	(122)	(155)	(84)	(447)
Balance		$ (1,812)	$ (2,051)	$ (1,812)	$ (2,051)

[1] In all periods presented, there were no tax impacts related to rate changes and no amounts were reclassified to earnings.