Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net loss	$ (1,199)	$ (1,075)
Other comprehensive income, net of tax:
Unrecognized actuarial gain, net of tax of $5 and $7, respectively	19	14
Foreign currency translation adjustments, net of tax of $356 and $466, respectively	1,325	851
Comprehensive income (loss)	$ 145	$ (210)