Organization and Nature of the Business	12 Months Ended
Dec. 31, 2021
Accounting Policies [Abstract]
Organization and Nature of the Business	1. Organization and Nature of the Business Overview Protara Therapeutics, Inc., and its consolidated subsidiaries (“Protara” or the “Company”), is a clinical-stage biopharmaceutical company committed to identifying and advancing transformative therapies for the treatment of cancer and rare diseases with significant unmet needs. Protara’s portfolio includes two development programs utilizing TARA-002, an investigational cell therapy in development for the treatment of lymphatic malformations (“LMs”) and non-muscle invasive bladder cancer (“NMIBC”). The third program in the portfolio is Intravenous (“IV”) Choline Chloride, an investigational phospholipid substrate replacement therapy initially in development for patients receiving parenteral nutrition (“PN”) who have intestinal failure associated liver disease (“IFALD”). On January 9, 2020, privately-held ArTara Subsidiary, Inc. (“Private ArTara”) and Protara Therapeutics, Inc. (formerly ArTara Therapeutics, Inc., formerly Proteon Therapeutics, Inc.) completed the merger and reorganization (the “Merger”), in accordance with the terms of the Agreement and Plan of Merger and Reorganization, dated September 23, 2019, (the “Merger Agreement”) by and among Protara Therapeutics, Inc., Private ArTara and REM 1 Acquisition, Inc., a wholly owned subsidiary of Protara Therapeutics, Inc (“Merger Sub”). Thereupon, Merger Sub merged with and into Private ArTara, with Private ArTara surviving as a wholly owned subsidiary of Protara Therapeutics, Inc. The Merger was structured as a reverse merger and Private ArTara was determined to be the accounting acquirer based on the terms of the Merger and other factors, and the post-merger company retained the name ArTara Therapeutics, Inc., which on May 11, 2020 was changed to Protara Therapeutics, Inc. On January 9, 2020, in connection with and prior to the completion of the Merger, Protara Therapeutics, Inc. effected a 1-for-40 reverse stock split of its common stock (the “Protara Reverse Stock Split”), Private ArTara changed its name from “ArTara Therapeutics, Inc.” to “ArTara Subsidiary, Inc.”, and ArTara Therapeutics, Inc. changed its name from “Proteon Therapeutics, Inc.” to “ArTara Therapeutics, Inc” then subsequently changed its name from “ArTara Therapeutics, Inc” to “Protara Therapeutics, Inc.” All share and per share amounts presented in this Annual Report on Form 10-K have been adjusted to reflect the Protara Reverse Stock Split and the Exchange Ratio (defined below). In addition, immediately following the closing of the Private Placements (defined below), all of the outstanding shares of Protara Therapeutics, Inc.’s Series A Preferred Stock were converted into shares of Protara Therapeutics, Inc.’s common stock. Shares of the Company’s common stock commenced trading on The Nasdaq Capital Market under the new name and ticker symbol “TARA” as of market open on January 10, 2020. See Note 3 for the full discussion regarding the Merger, Exchange Ratio and recapitalization Liquidity, Capital Resources and Management Plans The Company is in the business of developing biopharmaceuticals and has no current or near-term revenues. The Company has incurred substantial clinical and other costs in its drug development efforts. The Company will need to raise additional capital in order to fully realize management’s plans. The Company believes that its current financial resources are sufficient to satisfy the Company’s estimated liquidity needs for at least twelve months from the date of issuance of these consolidated financial statements. Impact of COVID-19 The ultimate impact of the current COVID-19 pandemic is highly uncertain and subject to change. The Company has experienced delays and may experience additional future delays that impact the business, research and development activities, the healthcare systems in which the Company operates and the global economy as a whole. Due to the continued evolution of the COVID-19 pandemic and the global responses to curb its spread, the Company is not able to estimate the ongoing effects on the Company’s results of operations, financial condition, or liquidity. The Company will continue to monitor the COVID-19 public health crisis closely including whether the effects would have a material impact on the Company’s operations, liquidity and capital resources

Organization and Nature of the Business

12 Months Ended

Dec. 31, 2021

1. Organization and Nature of the Business

Overview

Protara Therapeutics, Inc., and its consolidated subsidiaries (“Protara” or the “Company”), is a clinical-stage biopharmaceutical company committed to identifying and advancing transformative therapies for the treatment of cancer and rare diseases with significant unmet needs. Protara’s portfolio includes two development programs utilizing TARA-002, an investigational cell therapy in development for the treatment of lymphatic malformations (“LMs”) and non-muscle invasive bladder cancer (“NMIBC”). The third program in the portfolio is Intravenous (“IV”) Choline Chloride, an investigational phospholipid substrate replacement therapy initially in development for patients receiving parenteral nutrition (“PN”) who have intestinal failure associated liver disease (“IFALD”).

On January 9, 2020, privately-held ArTara Subsidiary, Inc. (“Private ArTara”) and Protara Therapeutics, Inc. (formerly ArTara Therapeutics, Inc., formerly Proteon Therapeutics, Inc.) completed the merger and reorganization (the “Merger”), in accordance with the terms of the Agreement and Plan of Merger and Reorganization, dated September 23, 2019, (the “Merger Agreement”) by and among Protara Therapeutics, Inc., Private ArTara and REM 1 Acquisition, Inc., a wholly owned subsidiary of Protara Therapeutics, Inc (“Merger Sub”). Thereupon, Merger Sub merged with and into Private ArTara, with Private ArTara surviving as a wholly owned subsidiary of Protara Therapeutics, Inc. The Merger was structured as a reverse merger and Private ArTara was determined to be the accounting acquirer based on the terms of the Merger and other factors, and the post-merger company retained the name ArTara Therapeutics, Inc., which on May 11, 2020 was changed to Protara Therapeutics, Inc.

On January 9, 2020, in connection with and prior to the completion of the Merger, Protara Therapeutics, Inc. effected a 1-for-40 reverse stock split of its common stock (the “Protara Reverse Stock Split”), Private ArTara changed its name from “ArTara Therapeutics, Inc.” to “ArTara Subsidiary, Inc.”, and ArTara Therapeutics, Inc. changed its name from “Proteon Therapeutics, Inc.” to “ArTara Therapeutics, Inc” then subsequently changed its name from “ArTara Therapeutics, Inc” to “Protara Therapeutics, Inc.” All share and per share amounts presented in this Annual Report on Form 10-K have been adjusted to reflect the Protara Reverse Stock Split and the Exchange Ratio (defined below). In addition, immediately following the closing of the Private Placements (defined below), all of the outstanding shares of Protara Therapeutics, Inc.’s Series A Preferred Stock were converted into shares of Protara Therapeutics, Inc.’s common stock. Shares of the Company’s common stock commenced trading on The Nasdaq Capital Market under the new name and ticker symbol “TARA” as of market open on January 10, 2020. See Note 3 for the full discussion regarding the Merger, Exchange Ratio and recapitalization

Liquidity, Capital Resources and Management Plans

The Company is in the business of developing biopharmaceuticals and has no current or near-term revenues. The Company has incurred substantial clinical and other costs in its drug development efforts. The Company will need to raise additional capital in order to fully realize management’s plans.

The Company believes that its current financial resources are sufficient to satisfy the Company’s estimated liquidity needs for at least twelve months from the date of issuance of these consolidated financial statements.

Impact of COVID-19

The ultimate impact of the current COVID-19 pandemic is highly uncertain and subject to change. The Company has experienced delays and may experience additional future delays that impact the business, research and development activities, the healthcare systems in which the Company operates and the global economy as a whole. Due to the continued evolution of the COVID-19 pandemic and the global responses to curb its spread, the Company is not able to estimate the ongoing effects on the Company’s results of operations, financial condition, or liquidity. The Company will continue to monitor the COVID-19 public health crisis closely including whether the effects would have a material impact on the Company’s operations, liquidity and capital resources