Other Income (Expense), Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Other Income and Expenses [Abstract]
Foreign exchange gain (loss)	$ (32)	$ (84)	$ (161)	$ (285)
Other income (expense)	(50)	(40)	(127)	(157)
Other expense, net	$ (82)	$ (124)	$ (288)	$ (442)