Intangible Assets and Goodwill - Schedule of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Goodwill, Beginning Balance	$ 4,619	$ 5,580
Foreign currency translation	445	(961)
Goodwill, Ending Balance	5,064	4,619
Domestic
Goodwill, Beginning Balance	4,321	5,221
Foreign currency translation	416	(900)
Goodwill, Ending Balance	4,737	4,321
International
Goodwill, Beginning Balance	298	359
Foreign currency translation	29	(61)
Goodwill, Ending Balance	$ 327	$ 298