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Consolidated Statements of Comprehensive (Loss) Income (Unaudited) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Income Statement [Abstract]    
Net (loss) income $ (574) $ 109
Other comprehensive (loss) income    
Foreign currency translation adjustments (166) 63
Amortization of net prior service costs and net actuarial (losses)/gains, net of tax (15) 26
Other comprehensive (loss) income (181) 89
Comprehensive (loss) income $ (755) $ 198