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Debt
 9 Months Ended
Sep. 30, 2025
Debt Disclosure [Abstract]  
Debt Debt
Senior Secured Convertible Note Financing
In August 2024, the Company entered into a securities purchase agreement (the “Securities Purchase Agreement”) with GKCC, an entity controlled by a member of the Company’s board of directors, pursuant to which the Company issued a 3% Senior Secured Convertible Promissory Note due February 15, 2026 (the “Convertible Note”) in the principal amount of $20.0 million (the “Convertible Note Financing”). Unless earlier converted in accordance with the terms of the Convertible Note, the Convertible Note would mature on February 15, 2026. Interest on the Convertible Note accrued and was payable quarterly in cash on the principal amount equal to 3% per annum, with an initial interest payment date of June 30, 2025.
The Company received net proceeds of approximately $19.7 million from the Convertible Note Financing, after deducting debt issuance costs.
The Convertible Note included multiple conversion features. The Company evaluated all conversion features included within the Convertible Note, under ASC 815, and determined that the default interest feature met the definition of a derivative, but the value was de minimis. During the nine months ended September 30, 2025, the Company recorded an immaterial amount in other expense related to the accretion of the discount of Convertible Note debt issuance costs. During the nine months ended September 30, 2025, the Company recorded accrued interest expense of $0.1 million related to the interest due on the Convertible Note but not yet payable.
In March 2025, the Company exercised its right under the Convertible Note to require GKCC to convert the full amount of the Convertible Note, including all accrued and unpaid interest, into shares of the Company’s common stock. In March 2025, the Company issued 3,500,573 shares of its common stock to GKCC in exchange for the principal balance of $20.0 million plus $0.3 million in accrued interest, in satisfaction in full of the Convertible Note.
Senior Secured Promissory Note Financing
In June 2025, the Company issued the June 2025 Promissory Note in the principal amount of $10.0 million to GKCC, an entity controlled by a member of the board of directors of the Company. The June 2025 Promissory Note will mature on June 3, 2028, or such earlier date as the June 2025 Promissory Note is required or permitted to be repaid in accordance with the terms of the June 2025 Promissory Note and is a senior, secured obligation of the Company and its subsidiaries. Interest will accrue and be payable in cash on the principal amount at the rate of the sum of the Prime Rate (as defined in the June 2025 Promissory Note) plus 5.00%, provided that the maximum interest rate shall not exceed 12.5% per annum, with an initial interest payment date of July 1, 2026. The June 2025 Promissory Note is secured by a (i) first priority lien on substantially all assets of the Company and its subsidiaries, pursuant to a security agreement and (ii) first priority lien on intellectual property of the Company, pursuant to an intellectual property security agreement. The June 2025 Promissory Note contains customary terms and covenants and customary events of default.
Additionally, in connection with the June 2025 Promissory Note Financing, the Company issued to GKCC the June 2025 Warrant to purchase an aggregate of 103,225 shares of the Company’s common stock. The June 2025 Warrant has an exercise price of $7.75 per share, is immediately exercisable and expires five years from the date of issuance. GKCC will not have the right to exercise any portion of the June 2025 Warrant if GKCC (together with its affiliates) would beneficially own in excess of 49.99% of the number of shares of the Company’s common stock outstanding immediately after giving effect to the exercise, as such percentage ownership is determined in accordance with the terms of the June 2025 Warrant. The fair value of the June 2025 Warrants, as determined by the Black-Scholes option pricing model, was $0.6 million at the date of issuance, and recorded as a debt discount to the June 2025 Promissory Note.
The Company received net proceeds of $9.9 million from the sale of the June 2025 Promissory Note, after deducting debt issuance costs. The June 2025 Promissory Note included multiple conversion features. The Company evaluated all conversion features included within the June 2025 Promissory Note, under ASC 815, and determined that the default interest feature met the definition of a derivative, but the value was immaterial. The net proceeds were allocated with the June 2025 Warrant using the relative fair value. As of September 30, the net carrying value of the June 2025 Promissory Note was $9.7 million and the debt discount for the June 2025 Promissory Note was $0.3 million. Accretion of the discount on the June 2025 Promissory Note was $0.4 million and $0.5 million for the three and nine months ended September 30, 2025, respectively.