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v3.25.3

Debt (Details) - USD ($) |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2025 | Jun. 30, 2025 | Aug. 31, 2024 | Sep. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2024 | Jan. 31, 2025 | Dec. 31, 2024
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Proceeds from issuance of common stock and common warrants from the January 2025 Offering |  |  |  |  | $ 9,143,000 | $ 0 |  |
Equity-classified broker warrants, number of shares of common stock to purchase (in shares) |  |  |  |  |  |  | 1,261,830 |
Exercise price of equity-classified broker warrants (in dollars per share) |  |  |  | $ 4.69 | $ 4.69 |  |  | $ 3.85
Net carrying value |  |  |  | $ 9,720,000 | $ 9,720,000 |  |  | $ 20,034,000
Other expense related to accretion of discount |  |  |  |  | 35,000 | $ 26,000 |  |
Common Stock | GKCC |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Ownership maximum (as a percent) |  | 49.99% |  |  |  |  |  |
Pre-Funded Warrant | Common Stock |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Equity-classified broker warrants, number of shares of common stock to purchase (in shares) |  | 3,500,573 |  |  |  |  |  |
Accrued interest | $ 300,000 |  |  |  |  |  |  |
Exercise price of equity-classified broker warrants (in dollars per share) |  |  |  |  |  |  | $ 7.80 |
June 2025 Warrants |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Warrants and rights outstanding |  | $ 600,000 |  |  |  |  |  |
Convertible Notes Payable |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Proceeds from issuance of common stock and common warrants from the January 2025 Offering |  |  | $ 19,700,000 |  |  |  |  |
Senior Secured Convertible Promissory Note |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 10,000,000 |  | 10,000,000 | 10,000,000 |  |  |
Equity-classified broker warrants, number of shares of common stock to purchase (in shares) |  | 103,225 |  |  |  |  |  |
Basis spread on variable rate |  | 5.00% |  |  |  |  |  |
Exercise price of equity-classified broker warrants (in dollars per share) |  | $ 7.75 |  |  |  |  |  |
Warrants, contractual term (in years) |  | 5 years |  |  |  |  |  |
Proceeds from Issuance of long-term debt |  | $ 9,900,000 |  |  |  |  |  |
Net carrying value |  |  |  | 9,700,000 | 9,700,000 |  |  |
Debt discount |  |  |  | 300,000 | 300,000 |  |  |
Other expense related to accretion of discount |  |  |  | $ 400,000 | $ 500,000 |  |  |
Senior Secured Convertible Promissory Note | Maximum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 12.50% | 12.50% |  |  |
Senior Secured Convertible Promissory Note | Convertible Notes Payable |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Stated interest rate |  |  | 3.00% |  |  |  |  |
Debt instrument, face amount |  |  | $ 20,000,000.0 |  |  |  |  |
Interest expense, debt |  |  |  |  | $ 100,000 |  |  |

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