Note 5 - Accumulated Other Comprehensive Loss - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Balance		$ 45,133	$ 46,523	$ 46,200	$ 22,321
Balance		44,583	45,898	44,583	45,898
AOCI Attributable to Parent [Member]
Balance		(1,674)	(1,563)	(1,604)	(1,370)
Foreign currency translation adjustments (1)	[1]	(222)	133	(292)	(60)
Balance		$ (1,896)	$ (1,430)	$ (1,896)	$ (1,430)

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