Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net loss	$ (2,661)	$ (2,183)
Foreign currency translation adjustments	275	275
Comprehensive loss	$ (2,386)	$ (1,908)