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Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2017
Commitments And Contingencies Disclosure [Abstract] |
Annual Purchase Requirements under Contract | The annual purchase requirements under the contract are as follows:
2018 |  | € | 8.9 million
2019 |  | € | 11.6 million
2020 |  | € | 15.5 million
2021 |  | € | 15.5 million
2022 |  | € | 19.4 million
2023 |  | € | 19.4 million
Schedule of Future Minimum Lease Payments | Future minimum lease payments are as follows:
2018 |  | $ | 522,000 |
2019 |  |  | 947,000 |
2020 |  |  | 976,000 |
2021 |  |  | 1,005,000 |
2022 |  |  | 1,035,000 |
Thereafter |  |  | 88,000 |
|  | $ | 4,573,000 |

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- Definition Tabular disclosure of key provisions of an arrangement under which the entity has agreed to purchase goods or services over a period of time greater than one year or the normal operating cycle, if longer, including the item for which expenditures will be made, minimum quantities, milestones, time period and committed amount. + References No definition available. + Details
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- Definition Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
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