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Information Related to Effect of Derivative Instruments on Our Consolidated Condensed Statements of (Loss) Income (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Gain (loss) on derivatives | $ 604 | $ 700 | $ (4,184) | $ 1,669
Product revenues | Foreign Currency Derivatives |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Gain (loss) on derivatives |  | 435 |  | 675
Other comprehensive income (loss) | Foreign Currency Derivatives |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Gain (loss) on derivatives | 1,458 | 297 | (3,337) | 1,063
Cost of sales | Foreign Currency Derivatives |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Gain (loss) on derivatives | (796) |  | (718) |
Foreign currency loss | Foreign Currency Derivatives |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Gain (loss) on derivatives | $ (58) | $ (32) | $ (129) | $ (69)

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959 + Details
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