Note 5 - Accumulated Other Comprehensive Loss - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Balance		$ 22,321	$ 26,175
Balance		46,523	23,453
AOCI Attributable to Parent [Member]
Balance		(1,370)	(1,778)
Foreign currency translation adjustments (1)	[1]	(193)	(231)
Balance		$ (1,563)	$ (2,009)

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