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Consolidated Statements of Comprehensive (Loss) Income (Unaudited) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Income Statement [Abstract]        
Net (loss) income $ (4,023) $ (796) $ 1,625 $ (1,370)
Other comprehensive (loss) income        
Foreign currency translation adjustments 374 (1) 62 (167)
Amortization of net prior service costs and net actuarial losses, net of tax 20 (1) 110 (16)
Other comprehensive income (loss) 394 (2) 172 (183)
Comprehensive (loss) income $ (3,629) $ (798) $ 1,797 $ (1,553)