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Revenue (Tables) | 6 Months Ended
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Jun. 30, 2018
Revenue Recognition and Deferred Revenue [Abstract] |
Disaggregation of revenue | We disaggregate our revenue by geographical region as follows:
Net Sales |  | For the three months ended June 30, 2018 |  | For the six months ended June 30, 2018
United States |  | $ | 279.4 |  |  | $ | 547.6 |
Iceland |  | 190.6 |  |  | 376.9 |
Total |  | $ | 470.0 |  |  | $ | 924.5 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130545-203045 + Details
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