Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income before income taxes:
Domestic	$ 5,577	$ 2,901	$ 13,988
Foreign	9,186	16,788	16,046
Total income before income taxes	14,763	19,689	30,034
Current:
Federal	388	3,210	5,511
State and local	378	256	1,152
Foreign	3,285	3,645	4,885
Total current	4,051	7,111	11,548
Deferred:
Federal	813	(241)	(1,039)
State and local	258	(176)	56
Foreign	(195)	104	(778)
Total deferred	876	(313)	(1,761)
Total income tax expense	$ 4,927	$ 6,798	$ 9,787