Goodwill and Intangible Assets - Changes in Carrying Amounts of Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Goodwill [Roll Forward]
Balance — Beginning	$ 7,834	$ 8,056
Currency translation adjustment	4	(222)
Balance — Ending	$ 7,838	$ 7,834