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Outstanding Debt - 2025 Loan Agreements with Warrants, 2025 Short-term Loans, 2025 Future Receipts Financing Arrangements, and July 2025 Private Placement (Details) |  |  |  |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended
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Sep. 29, 2025 USD ($) payment | Aug. 25, 2025 USD ($) | Aug. 22, 2025 USD ($) agreement payment $ / shares shares | Aug. 14, 2025 USD ($) | Aug. 01, 2025 USD ($) payment | Jul. 22, 2025 USD ($) debt_instrument agreement investor $ / shares shares | Jun. 22, 2025 USD ($) note $ / shares shares | May 22, 2025 USD ($) | Oct. 22, 2024 USD ($) | Sep. 11, 2025 USD ($) payment agreement | Sep. 30, 2025 USD ($) shares | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) shares | Sep. 30, 2024 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt extinguishment loss |  |  |  |  |  |  |  |  |  |  | $ (220,000) | $ 0 | $ 498,000 | $ 0
Amortization of debt discount |  |  |  |  |  |  |  |  |  |  |  |  | 1,813,000 | 983,000
Proceeds from issuance of note payable, net |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,914,000 | $ 8,334,000
Warrants (in shares) | shares |  |  |  |  |  |  |  |  |  |  | 7,050,000 |  | 7,050,000 |
Convertible Notes Payable |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discount, current |  |  |  |  |  |  |  |  |  |  | $ 3,233,000 |  | $ 3,233,000 |
Non-Convertible Promissory Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of non-convertible promissory notes issued | note |  |  |  |  |  |  | 2 |  |  |  |  |  |  |
Term note period (in months/years) |  |  |  |  |  |  | 12 months |  |  |  |  |  |  |
Unaffiliated Investor Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, face amount |  |  |  |  |  |  | $ 625,000 |  |  |  |  |  |  |
Debt discount |  |  |  |  |  |  | $ 125,000 |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  |  |  | 10.00% |  |  |  |  |  |  |
Fair value of debt |  |  |  |  |  |  | $ 433,000 |  |  |  |  |  |  |
Unaffiliated Investor Loan | Unaffiliated Investor Warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unvested warrants (in shares) | shares |  |  |  |  |  |  | 500,000 |  |  |  |  |  |  |
Warrants value |  |  |  |  |  |  | $ 115,000 |  |  |  |  |  |  |
CEO Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, face amount |  |  |  |  |  |  | 625,000 |  |  |  |  |  |  |
Debt discount |  |  |  |  |  |  | $ 125,000 |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  |  |  | 10.00% |  |  |  |  |  |  |
Proceeds from short-term debt |  |  |  |  |  |  | $ 500,000 |  |  |  |  |  |  |
CEO Loan | CEO Warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unvested warrants (in shares) | shares |  |  |  |  |  |  | 500,000 |  |  |  |  |  |  |
Exercise price of warrants (in dollars per share) | $ / shares |  |  |  |  |  |  | $ 0.60 |  |  |  |  |  |  |
Warrants term (in years) |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |
Warrants value |  |  |  |  |  |  | $ 115,000 |  |  |  |  |  |  |
Expected dividend yield (per share) |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |
Expected stock price volatility (as a percent) |  |  |  |  |  |  | 98.40% |  |  |  |  |  |  |
Risk-free rate of interest (as a percent) |  |  |  |  |  |  | 4.00% |  |  |  |  |  |  |
Expected term (years) |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |
2024 Term Note |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term note period (in months/years) |  |  |  |  |  |  |  |  | 12 months |  |  |  |  |
Debt, face amount |  |  |  |  |  |  |  |  | $ 500,000 |  |  |  |  |
Interest rate (as a percent) |  |  |  |  |  |  |  |  | 15.00% |  |  |  |  |
Extinguishment of debt amount |  |  |  |  |  |  | $ 500,000 |  |  |  |  |  |  |
Debt extinguishment loss |  |  |  |  |  |  |  |  |  |  |  |  | 48,000 |
Debt instrument, periodic payment terms, balloon payment to be paid |  |  |  |  |  |  |  |  | $ 506,250 |  |  |  |  |
Periodic payment interest |  |  |  |  |  |  |  |  | $ 6,250 |  |  |  |  |
May 2025 Note | Loans Payable |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from short-term debt |  |  |  |  |  |  |  | $ 200,000 |  |  |  |  |  |
Debt instrument, periodic payment terms, balloon payment to be paid |  |  |  |  |  |  |  | $ 250,000 |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  | 46,000 |
First August 2025 Note | Loans Payable |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from short-term debt |  |  |  |  | $ 100,000 |  |  |  |  |  |  |  |  |
Discount, current |  |  |  |  | 15,000 |  |  |  |  |  |  |  |  |
Periodic payment |  |  |  |  | $ 126,750 |  |  |  |  |  |  |  |  |
Number of periodic payments (weeks/months) | payment |  |  |  |  | 4 |  |  |  |  |  |  |  |  |
Amortization of debt discount |  |  |  |  |  |  |  |  |  |  | 4,000 |  |  |
Second August 2025 Note | Loans Payable |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from short-term debt |  |  |  | $ 150,000 |  |  |  |  |  |  |  |  |  |
Debt instrument, periodic payment terms, balloon payment to be paid |  |  |  | 159,452 |  |  |  |  |  |  |  |  |  |
Periodic payment interest |  |  |  | $ 9,452 |  |  |  |  |  |  |  |  |  |
Third August 2025 Notes | Loans Payable |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term note period (in months/years) |  |  |  |  |  |  |  |  |  | 10 months |  |  |  |
Proceeds from short-term debt |  |  |  |  |  |  |  |  |  | $ 400,000 |  |  |  |
Periodic payment |  |  |  |  |  |  |  |  |  | $ 528,000 |  |  |  |
Number of periodic payments (weeks/months) | payment |  |  |  |  |  |  |  |  |  | 4 |  |  |  |
Amortization of debt discount |  |  |  |  |  |  |  |  |  |  | 12,000 |  |  |
Number of agreements entered into | agreement |  |  |  |  |  |  |  |  |  | 2 |  |  |  |
Debt instrument, unamortized discount (premium) and debt issuance costs, net |  |  |  |  |  |  |  |  |  | $ 76,000 |  |  |  |
Periodic payment delay from issuance date (in months) |  |  |  |  |  |  |  |  |  | 6 months |  |  |  |
August Future Receipts Financing Agreements | Loans Payable |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, face amount |  |  | $ 1,400,000 |  |  |  |  |  |  |  |  |  |  |
Discount, current |  |  |  |  |  |  |  |  |  |  | 256,000 |  | 256,000 |
Periodic payment |  |  | $ 120,083 |  |  |  |  |  |  |  |  |  |  |
Number of periodic payments (weeks/months) | payment |  |  | 12 |  |  |  |  |  |  |  |  |  |  |
Amortization of debt discount |  |  |  |  |  |  |  |  |  |  |  |  | 52,000 |
Number of agreements entered into | agreement |  |  | 2 |  |  |  |  |  |  |  |  |  |  |
Net proceeds from short-term debt |  | $ 700,000 |  |  |  |  |  |  |  |  |  |  |  |
Origination fee |  | 188,000 |  |  |  |  |  |  |  |  |  |  |  |
Short-term loan payable |  |  |  |  |  |  |  |  |  |  | $ 1,100,000 |  | $ 1,100,000 |
August Future Receipts Financing Agreements | August Warrants | Loans Payable |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unvested warrants (in shares) | shares |  |  | 500,000 |  |  |  |  |  |  |  |  |  |  |
Exercise price of warrants (in dollars per share) | $ / shares |  |  | $ 0.50 |  |  |  |  |  |  |  |  |  |  |
Warrants term (in years) |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |
Warrants value |  |  | $ 120,000 |  |  |  |  |  |  |  |  |  |  |
Expected dividend yield (per share) |  |  | 0.00% |  |  |  |  |  |  |  |  |  |  |
Expected stock price volatility (as a percent) |  |  | 98.30% |  |  |  |  |  |  |  |  |  |  |
Risk-free rate of interest (as a percent) |  |  | 3.80% |  |  |  |  |  |  |  |  |  |  |
Expected term (years) |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |
Libertas Financing Agreement | Loans Payable |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of short-term debt |  | $ 553,000 |  |  |  |  |  |  |  |  |  |  |  |
September 2025 Future Receipts Financing Agreements | Loans Payable |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, face amount | $ 396,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Periodic payment | $ 19,800 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of periodic payments (weeks/months) | payment | 20 |  |  |  |  |  |  |  |  |  |  |  |  |
Origination fee | $ 6,600 |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of note payable, net | 330,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Brokerage fee | $ 77,000 |  |  |  |  |  |  |  |  |  |  |  |  |
July 2025 Notes | Convertible Notes Payable |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, face amount |  |  |  |  |  | $ 3,800,000 |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  |  | 10.00% |  |  |  |  |  |  |  |
Discount, current |  |  |  |  |  | $ 750,000 |  |  |  |  |  |  |  |
Number of agreements entered into | agreement |  |  |  |  |  | 2 |  |  |  |  |  |  |  |
Net proceeds from short-term debt |  |  |  |  |  | $ 2,800,000 |  |  |  |  |  |  |  |
Short-term loan payable |  |  |  |  |  | $ 3,000,000.0 |  |  |  |  |  |  |  |
Number of investors | investor |  |  |  |  |  | 2 |  |  |  |  |  |  |  |
Number of debt instruments issued | debt_instrument |  |  |  |  |  | 2 |  |  |  |  |  |  |  |
Debt discount (as a percent) |  |  |  |  |  | 20.00% |  |  |  |  |  |  |  |
Note conversion waiting period (in months) |  |  |  |  |  | 4 months |  |  |  |  |  |  |  |
Threshold percentage of stock price |  |  |  |  |  | 80.00% |  |  |  |  |  |  |  |
Embedded derivative liabilities |  |  |  |  |  | $ 3,200,000 |  |  |  |  |  |  |  |
July 2025 Notes | July Warrants | Convertible Notes Payable |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price of warrants (in dollars per share) | $ / shares |  |  |  |  |  | $ 0.50 |  |  |  |  |  |  |  |
Warrants term (in years) |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |
Warrants value |  |  |  |  |  | $ 1,300,000 |  |  |  |  |  |  |  |
Expected dividend yield (per share) |  |  |  |  |  | 0.00% |  |  |  |  |  |  |  |
Expected stock price volatility (as a percent) |  |  |  |  |  | 97.90% |  |  |  |  |  |  |  |
Risk-free rate of interest (as a percent) |  |  |  |  |  | 3.90% |  |  |  |  |  |  |  |
Expected term (years) |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |
Warrants (in shares) | shares |  |  |  |  |  | 5,250,000 |  |  |  |  |  |  |  |

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