Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation - Additional Information (Details)

v3.22.2
Basis of Presentation - Additional Information (Details)
 3 Months Ended 6 Months Ended 12 Months Ended
Jan. 21, 2020
USD ($)
Debtinstrument
Jun. 30, 2022
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
Jun. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Sep. 08, 2020
USD ($)
Apr. 30, 2020
USD ($)
Organization Consolidation And Presentation Of Financial Statements [Line Items]                
Net losses   $ 6,735,000 $ (7,798,000) $ 10,235,000 $ 91,123,000 $ 91,564,000    
Accumulated deficit   388,728,000   388,728,000   378,493,000    
Cash and cash equivalents   9,209,000   9,209,000   $ 27,446,000    
Short-term investments   59,666,000   59,666,000        
Iterum Therapeutics US Limited | Silicon Valley Bank (SVB) | Paycheck Protection Program                
Organization Consolidation And Presentation Of Financial Statements [Line Items]                
Aggregate principal amount               $ 744,000
Debt instrument interest rate               1.00%
2025 Exchangeable Notes                
Organization Consolidation And Presentation Of Financial Statements [Line Items]                
Aggregate principal amount   $ 12,607,000   $ 12,607,000        
Private Placement and Rights Offering | 2025 Exchangeable Notes                
Organization Consolidation And Presentation Of Financial Statements [Line Items]                
Aggregate principal amount             $ 51,808,000  
Debt instrument interest rate 6.50%              
Private Placement and Rights Offering | RLNs                
Organization Consolidation And Presentation Of Financial Statements [Line Items]                
Aggregate principal amount $ 104,000              
Private Placement | 2025 Exchangeable Notes                
Organization Consolidation And Presentation Of Financial Statements [Line Items]                
Aggregate principal amount 51,588,000              
Debt instrument price per unit 1,000              
Private Placement | RLNs                
Organization Consolidation And Presentation Of Financial Statements [Line Items]                
Aggregate principal amount $ 103,000              
Number of debt instruments within each notes | Debtinstrument 50