Note 7 - Income Taxes - Current and Deferred Provisions (Benefit) for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Current:
U.S. federal	$ 1,011	$ 1,945
Non-U.S.	5,142	6,780
U.S. state and local	326	694
Total current income tax provision	6,479	9,419
Deferred:
U.S. federal	576	687
Non-U.S.	1,645	310
U.S. state and local	53	(163)
Total deferred income tax provision	2,274	834
Total:
U.S. federal	1,587	2,632
Non-U.S.	6,787	7,090
U.S. state and local	379	531
Total income tax provision	$ 8,753	$ 10,253