Organization and Basis of Presentation | 1. Organization and Basis of Presentation Candel Therapeutics, Inc., formerly known as Advantagene, Inc. (the Company), is a clinical stage biopharmaceutical company that was incorporated in Delaware in June 2003. On November 30, 2020, the Company changed its name to Candel Therapeutics, Inc. The Company is focused on developing off-the-shelf viral immunotherapies that elicit an individualized, systemic anti-tumor immune response to help patients fight cancer. The Company’s engineered viruses are designed to induce immunogenic cell death through direct viral-mediated cytotoxicity in cancer cells, thus releasing tumor neo-antigens and creating a pro-inflammatory microenvironment at the site of injection. This is intended to lead to in-situ vaccination against the injected tumor and uninjected distant metastases. The Company has established two off-the-shelf viral immunotherapy platforms and its two product candidates, CAN-2409 and CAN-3110, are in clinical trials for a number of tumor types. Additionally, the Company and the University of Pennsylvania (UPenn) are collaborating to study the impact of novel viral immunotherapies based on Candel's propriety enLIGHTEN Discovery Platform, a systematic, iterative herpes simplex virus based platform leveraging human biology and advanced analytics, to strengthen the effects of UPenn's investigational CAR-T cell therapies in solid tumors. The Company is subject to risks and uncertainties common to early-stage companies in the biotechnology industry, including, but not limited to, development by competitors of new technological innovations, dependence on key personnel, protection of proprietary technology, compliance with government regulations and the ability to secure additional capital to fund operations. Product candidates currently under development will require significant additional research and development efforts, including preclinical and clinical testing and regulatory approval, prior to commercialization. These efforts require significant amounts of additional capital, adequate personnel and infrastructure and extensive compliance-reporting capabilities. Even if the Company’s product development efforts are successful, it is uncertain when, if ever, the Company will realize revenue from product sales. Since inception, the Company has funded its operations primarily with proceeds from the sale of its convertible notes and capital stock and from debt borrowings. The Company has incurred recurring losses since its inception, including a net loss of $ 30.5 million and $ 18.4 million for the six months ended June 30, 2024 and 2023, respectively. In addition, as of June 30, 2024, the Company had an accumulated deficit of $ 167.5 million . The Company expects to continue to generate operating losses and negative cash flows from operations for the foreseeable future. On August 5, 2022, the Company filed a shelf registration statement on Form S-3 (as amended to date, the Shelf) with the U.S. Securities and Exchange Commission (SEC), which covers the offering, issuance, and sale by us of up to an aggregate of $ 200.0 million of our common stock, preferred stock, debt securities, warrants and/or units of any combination thereof. We simultaneously entered into a sales agreement with Jefferies LLC, as sales agent, to provide for the issuance and sale by us of up to $ 75.0 million of our common stock from time to time in “at-the-market” offerings under the Shelf (the ATM Program). The Shelf was declared effective by the SEC on August 12, 2022. As of June 30, 2024, the Company has sold and issued 584,890 shares of common stock under the ATM Program, with total net proceeds of $ 3.6 million . Subsequent to June 30, 2024 and through August 5, 2024, the Company has sold and issued 683,851 additional shares of common stock under the ATM Program, with total net proceeds of $ 4.1 million . The Company’s cash and cash equivalents were $ 21.5 million as of June 30, 2024. In accordance with the Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC), 205-40, Presentation of Financial Statements - Going Concern, management is required to assess the Company’s ability to continue as a going concern for the one-year look forward period following the date that the condensed consolidated financial statements are issued. The Company expects to continue to generate operating losses and negative cash flows from operations. Based on these conditions, the Company has determined that substantial doubt exists regarding its ability to continue as a going concern for the one-year period following the date these condensed consolidated financial statements are issued. To sustain its future operations beyond such one-year period, the Company will require additional funding. The Company expects to finance its cash needs through a combination of public or private equity or debt financings, government grants, and other sources, which may include collaborations, strategic alliances and licensing arrangements with third parties. There is no assurance that the Company will be successful in obtaining sufficient funding on acceptable terms, if at all, and the Company could be forced to delay, reduce, or eliminate some or all of its research, clinical trials, product development or future commercialization efforts, which could materially adversely affect its business prospects or its ability to continue as a going concern. The accompanying condensed consolidated financial statements do not include any adjustments that might result from the outcome of this uncertainty. Accordingly, the condensed consolidated financial statements have been prepared on a basis that assumes the Company will continue as a going concern and that contemplates the realization of assets and satisfaction of liabilities and commitments in the ordinary course of business. |