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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Net (loss) income | $ (11,034) | $ (7,517) | $ 2,253
Unrealized loss on marketable securities | (1) | (1) | (3)
Foreign currency translation adjustment | 5,404 | (9,288) | (4,207)
Unrealized gain on derivative instruments, net | 89 | 80 | 57
Other comprehensive income (loss), net of tax (1) | 5,492 | (9,209) | (4,153)
Total comprehensive loss | $ (5,542) | $ (16,726) | $ (1,900)

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- Definition Amount of tax expense (benefit), after reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e640-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669646-108580 + Details
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