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Summary of Significant Accounting Policies (Tables) | 6 Months Ended
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Jun. 30, 2018
Accounting Policies [Abstract] |
Schedule of Potentially Dilutive Securities Excluded from Computation of Diluted Weighted-Average Shares Outstanding | The following potentially dilutive securities have been excluded from the computation of diluted weighted-average shares outstanding as they would be anti-dilutive:
|  | Six months ended |
|  | June 30, 2018 |  |  | June 30, 2017 |
Options to purchase ordinary shares |  |  | 696,112 |  |  |  | 66,832 |
Preferred shares convertible into ordinary shares |  |  | — |  |  |  | 5,686,667 |
Unvested restricted ordinary shares |  |  | 143,076 |  |  |  | 246,282 |
Unvested restricted stock units |  |  | 36,924 |  |  |  | — |
Warrants |  |  | 19,890 |  |  |  | — |
Total |  |  | 896,002 |  |  |  | 5,999,781 |
Schedule of Distribution of Total Operating Expenses by Geographical Area | The distribution of total operating expenses by geographical area was as follows:
|  | Three months ended June 30, |  |  | Six months ended June 30, |
Operating expenses |  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Ireland |  | $ | 12,811 |  |  | $ | 5,205 |  |  | $ | 22,775 |  |  | $ | 9,674 |
U.S. |  |  | 2,800 |  |  |  | 1,208 |  |  |  | 5,230 |  |  |  | 2,281 |
Total |  | $ | 15,611 |  |  | $ | 6,413 |  |  | $ | 28,005 |  |  | $ | 11,955 |
Schedule of Distribution of Long-Lived Assets by Geographical Area | The distribution of long-lived assets by geographical area was as follows:
Long lived assets |  | June 30, 2018 |  |  | December 31, 2017 |
Ireland |  | $ | 3,388 |  |  | $ | 2,341 |
U.S. |  |  | 369 |  |  |  | 243 |
Total |  | $ | 3,757 |  |  | $ | 2,584 |

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- Definition Tabular disclosure of long-lived assets, excluding financial instruments, long-term customer relationships of a financial institution, mortgage rights, deferred policy acquisition costs, and deferred tax assets, by geographic areas located in the entity's country of domicile and foreign countries in which the entity holds assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph b -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e9038-108599 + Details
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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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