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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Statement of Comprehensive Income [Abstract]        
Net income (loss) $ (463) $ 151 $ (1,848) $ (917)
Other comprehensive loss, net of tax:        
Unrealized (loss) gain on available-for-sale securities 109 15 111 (3)
Foreign currency translation adjustment (2,641) (3,754) (3,906) (2,836)
Unrealized (loss) gain on derivative instruments (13) 42 5 43
Other comprehensive loss, net of tax (2,763) (3,727) (4,012) (2,790)
Total comprehensive loss $ (3,226) $ (3,576) $ (5,860) $ (3,707)