XML 42 R31.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Summary of Significant Accounting Policies - Schedule of Potentially Dilutive Securities Excluded from Computation of Diluted Weighted-Average Shares Outstanding (Details) - shares | 6 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |
Potentially dilutive securities excluded from computation of diluted weighted-average shares outstanding | 896,002 | 5,999,781
Options to Purchase Ordinary Shares |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |
Potentially dilutive securities excluded from computation of diluted weighted-average shares outstanding | 696,112 | 66,832
Preferred Shares Convertible into Ordinary Shares |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |
Potentially dilutive securities excluded from computation of diluted weighted-average shares outstanding |  | 5,686,667
Unvested Restricted Ordinary Shares |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |
Potentially dilutive securities excluded from computation of diluted weighted-average shares outstanding | 143,076 | 246,282
Unvested Restricted Stock Units |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |
Potentially dilutive securities excluded from computation of diluted weighted-average shares outstanding | 36,924 |
Warrants |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |
Potentially dilutive securities excluded from computation of diluted weighted-average shares outstanding | 19,890 |

X
- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + 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
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=itrm_OptionsToPurchaseOrdinarySharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=us-gaap_ConvertiblePreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=itrm_UnvestedRestrictedOrdinarySharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=itrm_UnvestedRestrictedStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=us-gaap_WarrantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |