Goodwill and Intangible Assets, Goodwill (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Goodwill [Roll Forward]
Balance at beginning of period	$ 1,943	[1]
Foreign currency translation adjustments	(7)
Balance at end of period	$ 1,936

[1] Derived from the Company's audited consolidated financial statements as of December 31, 2018.