Note 1 - Organization and Significant Accounting Policies - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022
Balance		$ 44,841	$ 46,200
Balance		43,714	44,841
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance		(1,728)	(1,604)
Foreign currency translation adjustments (1)	[1]	(20)	(124)
Balance		$ (1,748)	$ (1,728)

[1] In all periods presented, there were no tax impacts related to functional currency translation adjustments.