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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Statement of Comprehensive Income [Abstract]        
Net income (loss) $ 37 $ 55 $ (1,385) $ (1,068)
Other comprehensive (loss) income, net of tax:        
Unrealized (loss) gain on available-for-sale securities 4 (10) 2 (18)
Foreign currency translation adjustment 3,570 670 (1,265) 918
Unrealized gain (loss) on derivative instruments 31 (8) 18 1
Other comprehensive income (loss), net of tax 3,597 672 (1,249) 937
Total comprehensive income (loss) $ 3,634 $ 727 $ (2,634) $ (131)