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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Statement of Comprehensive Income [Abstract]    
Net loss $ (3,893) $ (4,885)
Other comprehensive income, net of tax:    
Unrealized gain on available-for-sale securities 1 0
Foreign currency translation adjustment 2,444 601
Unrealized gain on derivative instruments, net 22 27
Other comprehensive income, net of tax(1) 2,467 628
Total comprehensive loss $ (1,426) $ (4,257)