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Derivative Financial Instruments (Tables) | 9 Months Ended
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Sep. 30, 2019
Derivative Financial Instruments [Abstract] |
Gains (Losses) Related to Derivative Instruments Designated as Cash Flow Hedges | The following table summarizes gains (losses) related to derivative instruments recorded in other comprehensive income (loss) during the three- and nine-month periods ended September 30, 2019 and 2018 (U.S. dollars in thousands):
|  | Amount of Gain (Loss) Recognized in Other Comprehensive Loss |
Derivatives Designated |  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
as Hedging Instruments: |  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Foreign currency forward contracts related to intercompany license fee, product sales, and selling expense hedges |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | (160 | )
|  |  | Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income |
Derivatives Designated | Location of Gain (Loss) Reclassified from Accumulated |  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
as Hedging Instruments: | Other Comprehensive Loss into Income |  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Foreign currency forward contracts related to intercompany license fees and product sales hedges | Revenue |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 18 |

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- Definition Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4E -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624181-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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