{"cik":1649904,"taxonomy":"us-gaap","tag":"IncreaseDecreaseInAccountsReceivable","label":"Increase (Decrease) in Accounts Receivable","description":"The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.","entityName":"RHYTHM PHARMACEUTICALS, INC.","units":{"USD":[{"start":"2021-01-01","end":"2021-12-31","val":1250000,"accn":"0001558370-23-002613","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-01"},{"start":"2021-01-01","end":"2021-12-31","val":1250000,"accn":"0001558370-24-002181","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29","frame":"CY2021"},{"start":"2022-01-01","end":"2022-06-30","val":1705000,"accn":"0001558370-23-012739","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-01"},{"start":"2022-01-01","end":"2022-09-30","val":2303000,"accn":"0001558370-23-018291","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-08"},{"start":"2022-01-01","end":"2022-12-31","val":5199000,"accn":"0001558370-23-002613","fy":2022,"fp":"FY","form":"10-K","filed":"2023-03-01"},{"start":"2022-01-01","end":"2022-12-31","val":5199000,"accn":"0001558370-24-002181","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"start":"2022-01-01","end":"2022-12-31","val":5199000,"accn":"0001558370-25-001889","fy":2024,"fp":"FY","form":"10-K","filed":"2025-02-28","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":1893000,"accn":"0001558370-23-007675","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-05-02"},{"start":"2023-01-01","end":"2023-03-31","val":1893000,"accn":"0001558370-24-007076","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-07","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":7607000,"accn":"0001558370-23-012739","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-01"},{"start":"2023-01-01","end":"2023-06-30","val":7607000,"accn":"0001558370-24-011101","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-06"},{"start":"2023-01-01","end":"2023-09-30","val":8317000,"accn":"0001558370-23-018291","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-08"},{"start":"2023-01-01","end":"2023-09-30","val":8317000,"accn":"0001558370-24-014532","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-06"},{"start":"2023-01-01","end":"2023-12-31","val":8643000,"accn":"0001558370-24-002181","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-29"},{"start":"2023-01-01","end":"2023-12-31","val":8643000,"accn":"0001558370-25-001889","fy":2024,"fp":"FY","form":"10-K","filed":"2025-02-28"},{"start":"2023-01-01","end":"2023-12-31","val":8643000,"accn":"0001628280-26-012399","fy":2025,"fp":"FY","form":"10-K","filed":"2026-02-26","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-172000,"accn":"0001558370-24-007076","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-07"},{"start":"2024-01-01","end":"2024-03-31","val":-172000,"accn":"0001558370-25-006765","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-07","frame":"CY2024Q1"},{"start":"2024-01-01","end":"2024-06-30","val":2731000,"accn":"0001558370-24-011101","fy":2024,"fp":"Q2","form":"10-Q","filed":"2024-08-06"},{"start":"2024-01-01","end":"2024-06-30","val":2731000,"accn":"0001558370-25-010302","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-05"},{"start":"2024-01-01","end":"2024-09-30","val":4439000,"accn":"0001558370-24-014532","fy":2024,"fp":"Q3","form":"10-Q","filed":"2024-11-06"},{"start":"2024-01-01","end":"2024-09-30","val":4439000,"accn":"0001104659-25-106264","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-04"},{"start":"2024-01-01","end":"2024-12-31","val":3645000,"accn":"0001558370-25-001889","fy":2024,"fp":"FY","form":"10-K","filed":"2025-02-28"},{"start":"2024-01-01","end":"2024-12-31","val":3645000,"accn":"0001628280-26-012399","fy":2025,"fp":"FY","form":"10-K","filed":"2026-02-26","frame":"CY2024"},{"start":"2025-01-01","end":"2025-03-31","val":-687000,"accn":"0001558370-25-006765","fy":2025,"fp":"Q1","form":"10-Q","filed":"2025-05-07"},{"start":"2025-01-01","end":"2025-03-31","val":-687000,"accn":"0001628280-26-030549","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-05-05","frame":"CY2025Q1"},{"start":"2025-01-01","end":"2025-06-30","val":7145000,"accn":"0001558370-25-010302","fy":2025,"fp":"Q2","form":"10-Q","filed":"2025-08-05"},{"start":"2025-01-01","end":"2025-09-30","val":13745000,"accn":"0001104659-25-106264","fy":2025,"fp":"Q3","form":"10-Q","filed":"2025-11-04"},{"start":"2025-01-01","end":"2025-12-31","val":7570000,"accn":"0001628280-26-012399","fy":2025,"fp":"FY","form":"10-K","filed":"2026-02-26","frame":"CY2025"},{"start":"2026-01-01","end":"2026-03-31","val":8110000,"accn":"0001628280-26-030549","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-05-05","frame":"CY2026Q1"}]}}