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Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Statement Of Income And Comprehensive Income [Abstract]        
Net income (loss) before dividends on redeemable convertible preferred stock $ 151 $ 547 $ (2,732) $ 821
Other comprehensive income:        
Foreign currency translation gain (loss), net of deferred income taxes (165) 52 (65) (95)
Total comprehensive income (loss) $ (14) $ 599 $ (2,797) $ 726