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v3.22.1

Debt - Additional Information (Details) |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended | 14 Months Ended
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Nov. 02, 2020 USD ($) $ / shares shares | Sep. 08, 2020 USD ($) Debtinstrument $ / shares shares | Apr. 30, 2020 USD ($) | Jan. 21, 2020 USD ($) Debtinstrument $ / shares shares | Apr. 27, 2018 USD ($) $ / shares shares | Dec. 31, 2020 USD ($) | Nov. 30, 2020 USD ($) | Mar. 31, 2022 USD ($) $ / shares shares | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Mar. 31, 2022 USD ($) $ / shares shares
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of warrants to purchase preferred shares | shares |  |  |  |  |  |  |  | 380,000 |  |  | 380,000
Accretion of debt discounts and deferred financing costs |  |  |  |  |  |  |  | $ 572,000 | $ 2,372,000 |  |
Ordinary Shares |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of warrants to purchase preferred shares | shares |  |  |  |  | 19,890 |  |  | 19,890 |  |  | 19,890
Loan and Security Agreement | Silicon Valley Bank (SVB) |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Loan and security agreement entered date |  |  |  |  |  |  |  | Apr. 27, 2018 |  |  |
Funded amount under agreement |  |  |  |  | $ 15,000,000 |  |  |  |  |  |
Remaining borrowing facility available date |  |  |  |  | Oct. 31, 2019 |  |  |  |  |  |
Maximum amount available under agreement |  |  |  |  | $ 30,000,000 |  |  |  |  |  |
Date of first required payment of initial draw |  |  |  |  | Nov. 01, 2019 |  |  |  |  |  |
Minimum fixed interest rate per annum |  |  |  |  | 8.31% |  |  |  |  |  |
Final interest rate payment on outstanding principal |  |  |  |  | 4.20% |  |  |  |  |  |
Principal and interest payment, maturity date |  |  |  |  | Mar. 01, 2022 |  |  |  |  |  |
Final payment fee |  |  |  |  | $ 630,000 |  |  |  |  |  |
Principal payment during the period |  |  |  |  | $ 1,552,000 |  |  |  |  |  |
Effective annual interest rate on outstanding debt |  |  |  |  |  |  |  | 12.51% |  |  | 12.51%
Interest expense |  |  |  |  |  |  |  | $ 16,000 | 210,000 |  |
Accretion of debt discounts and deferred financing costs |  |  |  |  |  |  |  | $ 6,000 | 60,000 |  |
Loan and Security Agreement | Silicon Valley Bank (SVB) | Wall Street Journal Prime Rate |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread on interest rate |  |  |  |  | 3.89% |  |  |  |  |  |
Loan and Security Agreement | Silicon Valley Bank (SVB) | Maximum |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maximum amount available under second draw |  |  |  |  | $ 15,000,000 |  |  |  |  |  |
Silicon Valley Bank and Life Sciences Fund II LLC | Series B Convertible Preferred Shares |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of warrants to purchase preferred shares | shares |  |  |  |  | 19,890 |  |  | 19,890 |  |  | 19,890
Warrants to purchase preferred shares, exercise price | $ / shares |  |  |  |  | $ 18.85 |  |  | $ 18.85 |  |  | $ 18.85
2025 Exchangeable Notes |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  | $ 205,000 | 436,000 |  |
Accretion of debt discounts and deferred financing costs |  |  |  |  |  |  |  | 578,000 | $ 1,108,000 |  |
Aggregate principal amount |  |  |  | $ 9,891,000 |  |  |  |  |  |  |
Debt instrument, outstanding principal |  |  |  |  |  |  |  | $ 12,607,000 |  |  | $ 12,607,000
Debt instrument, payment terms |  |  |  |  |  |  |  | The Company will be required to pay each holder of the Exchangeable Notes the greater of three times the outstanding principal amount of such Exchangeable Note and the consideration that would be received by the holder of such Exchangeable Note in connection with such Fundamental Change if the holder had exchanged its note for ordinary shares immediately prior to the consummation of such Fundamental Change, plus any accrued and unpaid interest. |  |  |
Fair value of derivative liability |  |  |  | 27,038,000 |  |  |  |  |  |  |
Fair value of derivative liability related to rights offering |  | $ 82,000 |  |  |  |  |  |  |  |  |
Financing transaction costs |  |  |  |  |  |  |  |  |  | $ 2,848,000 |
Financing transaction costs, capitalized |  |  |  |  |  | $ 2,814,000 |  |  |  | $ 2,814,000 |
2025 Exchangeable Notes | Private Placement |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  | 51,588,000 |  |  |  |  |  |  |
Debt instrument price per unit |  | 1,000 |  | 1,000 |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  | $ 39,201,000,000 |  |  | $ 39,201,000,000
Notes exchanged for ordinary shares | shares |  |  |  |  |  |  |  |  |  |  | 53,888,331
Debt instrument, outstanding principal |  |  |  |  |  |  |  | 12,607,000,000 |  |  | $ 12,607,000,000
2025 Exchangeable Notes | Private Placement and Rights Offering |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  | $ 220,000 |  |  |  |  |  |  |  |  |
RLNs | Private Placement |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  | $ 103,000 |  |  |  |  |  |  |
Number of debt instruments within each notes | Debtinstrument |  | 50 |  | 50 |  |  |  |  |  |  |
RLNs | Private Placement and Rights Offering |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  | $ 440 |  |  |  |  |  |  |  |  |
Securities | Private Placement |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument price per unit |  | $ 1,000 |  | $ 1,000 |  |  |  |  |  |  |
Debt instrument, shares embedded within each unit, shares | shares | 1,286.1845 | 1,000 |  | 1,000 |  |  |  |  |  |  |
Debt instrument, shares embedded within each unit, value | $ 1,000 | $ 1,000 |  | $ 1,000 |  |  |  |  |  |  |
Debt instrument, shares embedded within each unit, exchange price | $ / shares | $ 0.7775 | $ 1.00 |  | $ 1.00 |  |  |  |  |  |  |
Paycheck Protection Program | Silicon Valley Bank (SVB) | Iterum Therapeutics US Limited |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  | $ 0 |  |  |
Aggregate principal amount |  |  | $ 744,000 |  |  |  |  |  |  |  |
Debt instrument interest rate |  |  | 1.00% |  |  |  |  |  |  |  |
Debt instrument maturity period |  |  | 2 years |  |  |  |  |  |  |  |
Debt instrument, description |  |  |  |  |  |  |  | Under the terms of the agreement, there were no payments due by the Company until the SBA remitted the forgiveness amount to Iterum US Limited or until after the 10 months after the end of the six-month period beginning April 30, 2020 (the Deferral Period). Following the Deferral Period, equal monthly repayments of principal and interest were due to fully amortize the principal amount outstanding on the PPP loan by the maturity date. |  |  |
Debt instrument, forgiveness loan |  |  |  |  |  |  | $ 340,000 |  |  |  |
Debt instrument, remaining amount amortized |  |  |  |  |  | $ 404,000 |  |  |  |  |
Debt Instrument, principal repayments |  |  |  |  |  |  |  | $ 69,000 |  |  |

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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=121570589&loc=SL51823488-111719 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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