Organization and description of business	6 Months Ended
Jun. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and description of business	1. Organization and description of business Galera Therapeutics, Inc. was incorporated as a Delaware corporation on November 19, 2012 (inception) and together with its subsidiaries (the Company, or Galera) is a biopharmaceutical company that since its inception has focused on developing a portfolio of small molecule dismutase (SOD) mimetics to improve radiotherapy in cancer, primarily by reducing one of the most common side effects of radiotherapy, severe oral mucositis (SOM). The U.S. Food and Drug Administration (FDA) has granted Fast Track and Breakthrough Therapy designations to our product candidate, avasopasem, for the reduction of SOM induced radiotherapy. Galera advanced avasopasem through Phase 1, then conducted a 223-patient randomized Phase 2 (GT-201) clinical trial and a 455-patient Phase 3 (ROMAN) clinical trial. In August 2023, the Company announced that it had received a Complete Response Letter (CRL) from the FDA regarding the Company’s New Drug Application (NDA) for avasopasem for radiotherapy-induced SOM in patients with head and neck cancer (HNC) undergoing standard-of-care treatment. In the CRL, the FDA communicated that results from an additional clinical trial will be required for resubmission. During the Type A meeting held in September 2023, and in the subsequently received meeting minutes, the FDA reiterated the need for a second Phase 3 trial to support resubmission of the NDA. However, it remains infeasible to conduct an additional trial with the Company’s current resources. Following the Company's receipt of the CRL, the Company wound down its commercial readiness efforts for avasopasem, reduced headcount across several departments and began to pursue strategic alternatives. The reduction in force, which was approved by the Company’s board of directors, reduced the Company’s workforce by 22 employees, or approximately 70%, as of August 9, 2023 (the Workforce Reduction). The decision was based on cost-reduction initiatives intended to reduce operating expenses. Further reductions in employee headcount occurred in 2024. As of June 30, 2025, the Company had three employees. In October 2023, the Company also announced that it had engaged Stifel, Nicolaus & Company, Inc. (Stifel), as its financial advisor, to assist in reviewing strategic alternatives with the goal of maximizing value for its stockholders. The Company also halted its clinical trials of its other product candidate, rucosopasem, following a futility analysis. Following the conclusion of its review of strategic alternatives, on August 8, 2024 the Company’s board of directors approved the Company’s liquidation and dissolution pursuant to a plan of complete liquidation and dissolution (Plan of Dissolution), subject to stockholder approval. The Plan of Dissolution contemplated an orderly wind down of the Company’s business and operations in accordance with the provisions of Delaware law. However, at the special meeting of stockholders held on October 17, 2024, the Plan of Dissolution was not approved by the Company’s stockholders. As the Company’s stockholders did not approve the Plan of Dissolution, the Company’s board of directors and management continued to explore what, if any, other alternatives were available for the future of the Company in light of its discontinued business activities and limited resources. On December 30, 2024, the Company completed the acquisition of Nova Pharmaceuticals, Inc. (Nova), a privately-held biotechnology company advancing a pan-inhibitor of nitric oxide synthase to treat patients with highly resistant forms of breast cancer, including metaplastic breast cancer (MpBC) and other refractory subsets of triple-negative breast cancer (TNBC). The Company issued 119,318.285 shares of Series B Non-Voting Convertible Preferred Stock (Series B) to the securityholders of Nova, each share of which is convertible into 1,000 shares of the Company’s common stock. The Company continues as Galera Therapeutics, Inc., and its common stock is listed on the Over-The-Counter Quote Bulletin Board - Venture Market (OTCQB:GRTX). Following the acquisition of Nova, Galera’s clinical portfolio now includes three clinical-stage product candidates: a pan-inhibitor of nitric oxide synthase (NOS) and two SOD mimetics. Superoxide and Nitric Oxide (NO) each play critical and complementary roles in the tumor microenvironment (TME), in the initiation, progression and metastasis of many cancers and in the immune responses to cancer. Specifically, NOS has been shown to be over-expressed in TNBC and especially in the rare subset of TNBC known as MpBC, that today has no effective or regulatory approved therapy. Initial clinical data with our pan-NOS inhibitor in these patients, when combined with a taxane, have been promising. Galera’s lead program is now an investigator-sponsored Phase 1/2 trial of the pan-NOS inhibitor in combination with nab-paclitaxel and alpelisib for MpBC, which is being conducted at Methodist Hospital in Houston, Texas (Houston Methodist) with funding by a grant from the National Institutes of Health. Assuming we are successful in securing additional capital, a second trial for this agent is planned in TNBC in collaboration with the I-SPY 2 consortium. Liquidity The Company has incurred recurring losses and negative cash flows from operations since inception and has an accumulated deficit of $459.0 million as of June 30, 2025. The Company anticipates incurring additional losses until such time, if ever, that it can generate significant sales of its product candidates currently in development. The Company follows the provisions of the Financial Accounting Standards Board (FASB), Accounting Standards Codification (ASC) Topic 205-40, Presentation of Financial Statements—Going Concern, which requires management to assess the Company’s ability to continue as a going concern for one year after the date the financial statements are issued. The Company expects its existing cash and cash equivalents as of June 30, 2025 will not enable the Company to fund its operating expenses and capital expenditure requirements for more than one year after the date these consolidated financial statements are issued, and therefore management has concluded that substantial doubt exists about the Company’s ability to continue as a going concern. Management’s plans to mitigate this risk include raising additional capital through equity or debt financings, or through strategic transactions. Management’s plans may also include the deferral of certain operating expenses unless and until additional capital is received. However, there can be no assurance that the Company will be successful in raising additional capital or that such capital, if available, will be on terms that are acceptable to the Company, or that the Company will be successful in deferring certain operating expenses. If the Company is unable to raise sufficient additional capital or defer sufficient operating expenses, the Company may be compelled to reduce the scope of its operations and planned capital expenditures. In the future, if the Company is not able to continue to raise sufficient capital to fund its operations, the Company may decide to delay or discontinue certain activities, including planned research and development activities, hiring plans, manufacturing activities and commercial preparation efforts. The consolidated financial statements have been prepared assuming the Company will continue as a going concern, which contemplates the continuity of operations, the realization of assets and the satisfaction of liabilities and commitments in the normal course of business. The consolidated financial statements do not include any adjustments to the carrying amounts and classification of assets, liabilities, and reported expenses that may be necessary if the Company were unable to continue as a going concern. In December 2024, the Company completed a private placement with a group of investors led by Ikarian Capital. The Company issued 21,070,220 shares of common stock plus pre-funded warrants exercisable for 23,041,040 shares of common stock at an offering price of $0.065 per share or pre-funded warrant. The Company received net proceeds of approximately $2.9 million after deducting issuance costs of approximately $27,000, of which $0.6 million was received in January 2025. The pre-funded warrants have an exercise price of $0.001 per share, are exercisable immediately following their issuance and never expire.

Galera Therapeutics, Inc. was incorporated as a Delaware corporation on November 19, 2012 (inception) and together with its subsidiaries (the Company, or Galera) is a biopharmaceutical company that since its inception has focused on developing a portfolio of small molecule dismutase (SOD) mimetics to improve radiotherapy in cancer, primarily by reducing one of the most common side effects of radiotherapy, severe oral mucositis (SOM). The U.S. Food and Drug Administration (FDA) has granted Fast Track and Breakthrough Therapy designations to our product candidate, avasopasem, for the reduction of SOM induced radiotherapy. Galera advanced avasopasem through Phase 1, then conducted a 223-patient randomized Phase 2 (GT-201) clinical trial and a 455-patient Phase 3 (ROMAN) clinical trial.

In August 2023, the Company announced that it had received a Complete Response Letter (CRL) from the FDA regarding the Company’s New Drug Application (NDA) for avasopasem for radiotherapy-induced SOM in patients with head and neck cancer (HNC) undergoing standard-of-care treatment. In the CRL, the FDA communicated that results from an additional clinical trial will be required for resubmission. During the Type A meeting held in September 2023, and in the subsequently received meeting minutes, the FDA reiterated the need for a second Phase 3 trial to support resubmission of the NDA. However, it remains infeasible to conduct an additional trial with the Company’s current resources.

Following the Company's receipt of the CRL, the Company wound down its commercial readiness efforts for avasopasem, reduced headcount across several departments and began to pursue strategic alternatives. The reduction in force, which was approved by the Company’s board of directors, reduced the Company’s workforce by 22 employees, or approximately 70%, as of August 9, 2023 (the Workforce Reduction). The decision was based on cost-reduction initiatives intended to reduce operating expenses. Further reductions in employee headcount occurred in 2024. As of June 30, 2025, the Company had three employees.

In October 2023, the Company also announced that it had engaged Stifel, Nicolaus & Company, Inc. (Stifel), as its financial advisor, to assist in reviewing strategic alternatives with the goal of maximizing value for its stockholders. The Company also halted its clinical trials of its other product candidate, rucosopasem, following a futility analysis.

Following the conclusion of its review of strategic alternatives, on August 8, 2024 the Company’s board of directors approved the Company’s liquidation and dissolution pursuant to a plan of complete liquidation and dissolution (Plan of Dissolution), subject to stockholder approval. The Plan of Dissolution contemplated an orderly wind down of the Company’s business and operations in accordance with the provisions of Delaware law. However, at the special meeting of stockholders held on October 17, 2024, the Plan of Dissolution was not approved by the Company’s stockholders.

As the Company’s stockholders did not approve the Plan of Dissolution, the Company’s board of directors and management continued to explore what, if any, other alternatives were available for the future of the Company in light of its discontinued business activities and limited resources. On December 30, 2024, the Company completed the acquisition of Nova Pharmaceuticals, Inc. (Nova), a privately-held biotechnology company advancing a pan-inhibitor of nitric oxide synthase to treat patients with highly resistant forms of breast cancer, including metaplastic breast cancer (MpBC) and other refractory subsets of triple-negative breast cancer (TNBC). The Company issued 119,318.285 shares of Series B Non-Voting Convertible Preferred Stock (Series B) to the securityholders of Nova, each share of which is convertible into 1,000 shares of the Company’s common stock. The Company continues as Galera Therapeutics, Inc., and its common stock is listed on the Over-The-Counter Quote Bulletin Board - Venture Market (OTCQB:GRTX).

Following the acquisition of Nova, Galera’s clinical portfolio now includes three clinical-stage product candidates: a pan-inhibitor of nitric oxide synthase (NOS) and two SOD mimetics. Superoxide and Nitric Oxide (NO) each play critical and complementary roles in the tumor microenvironment (TME), in the initiation, progression and metastasis of many cancers and in the immune responses to cancer. Specifically, NOS has been shown to be over-expressed in TNBC and especially in the rare subset of TNBC known as MpBC, that today has no effective or regulatory approved therapy. Initial clinical data with our pan-NOS inhibitor in these patients, when combined with a taxane, have been promising. Galera’s lead program is now an investigator-sponsored Phase 1/2 trial of the pan-NOS inhibitor in combination with nab-paclitaxel and alpelisib for MpBC, which is being conducted at Methodist Hospital in Houston, Texas (Houston Methodist) with funding by a grant from the National Institutes of Health. Assuming we are successful in securing additional capital, a second trial for this agent is planned in TNBC in collaboration with the I-SPY 2 consortium.

Liquidity

The Company has incurred recurring losses and negative cash flows from operations since inception and has an accumulated deficit of $459.0 million as of June 30, 2025. The Company anticipates incurring additional losses until such time, if ever, that it can generate significant sales of its product candidates currently in development. The Company follows the provisions of the Financial Accounting Standards Board (FASB), Accounting Standards Codification (ASC) Topic 205-40, Presentation of Financial Statements—Going Concern, which requires management to assess the Company’s ability to continue as a going concern for one year after the date the financial statements are issued. The Company expects its existing cash and cash equivalents as of June 30, 2025 will not enable the Company to fund its operating expenses and capital expenditure requirements for more than one year after the date these consolidated financial statements are issued, and therefore management has concluded that substantial doubt exists about the Company’s ability to continue as a going concern. Management’s plans to mitigate this risk include raising additional capital through equity or debt financings, or through strategic transactions. Management’s plans may also include the deferral of certain operating expenses unless and until additional capital is received. However, there can be no assurance that the Company will be successful in raising additional capital or that such capital, if available, will be on terms that are acceptable to the Company, or that the Company will be successful in deferring certain operating expenses. If the Company is unable to raise sufficient additional capital or defer sufficient operating expenses, the Company may be compelled to reduce the scope of its operations and planned capital expenditures. In the future, if the Company is not able to continue to raise sufficient capital to fund its operations, the Company may decide to delay or discontinue certain activities, including planned research and development activities, hiring plans, manufacturing activities and commercial preparation efforts. The consolidated financial statements have been prepared assuming the Company will continue as a going concern, which contemplates the continuity of operations, the realization of assets and the satisfaction of liabilities and commitments in the normal course of business. The consolidated financial statements do not include any adjustments to the carrying amounts and classification of assets, liabilities, and reported expenses that may be necessary if the Company were unable to continue as a going concern.

In December 2024, the Company completed a private placement with a group of investors led by Ikarian Capital. The Company issued 21,070,220 shares of common stock plus pre-funded warrants exercisable for 23,041,040 shares of common stock at an offering price of $0.065 per share or pre-funded warrant. The Company received net proceeds of approximately $2.9 million after deducting issuance costs of approximately $27,000, of which $0.6 million was received in January 2025. The pre-funded warrants have an exercise price of $0.001 per share, are exercisable immediately following their issuance and never expire.