Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current income tax expense:
Foreign	$ 1,301	$ 1,331	$ 778
Federal	0	4	0
State and local	1	1	22
Current income tax expense (benefit)	1,302	1,336	800
Deferred income tax expense (benefit):
Foreign	(176)	(133)	(413)
Federal	0	0	19
Deferred income tax expense (benefit)	(176)	(133)	(394)
Provision for income taxes	$ 1,126	$ 1,203	$ 406