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Revenue Interest Financing Payable - Terms (Details) $ in Thousands |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 05, 2024 USD ($) | Jan. 04, 2024 USD ($) | Jan. 04, 2024 USD ($) | Jan. 03, 2024 USD ($) | Jul. 27, 2023 USD ($) | Jan. 27, 2023 USD ($) | Jan. 09, 2023 USD ($) tranche | Jul. 27, 2023 USD ($) | Mar. 31, 2024 USD ($) | Mar. 31, 2023 USD ($) | Dec. 31, 2023 USD ($)
Revenue Interest Financing Payable |  |  |  |  |  |  |  |  |  |  |
Amount of debt repaid with initial investment from RIFA |  |  |  |  |  |  |  |  |  | $ 2,190 |
Loss on extinguishment | $ 11,483 |  |  |  |  |  |  |  | $ (11,483) | $ (2,311) | $ (2,300)
Amount funded under the second tranche |  |  | $ 24,975 |  |  |  |  |  |  |  |
Payments Due Third Quarter of 2025 |  |  |  |  |  |  |  |  |  |  |
Revenue Interest Financing Payable |  |  |  |  |  |  |  |  |  |  |
One-time fixed payment amount |  |  |  | $ 23,800 |  |  |  |  |  |  |
Revenue Interest Financing Agreement |  |  |  |  |  |  |  |  |  |  |
Revenue Interest Financing Payable |  |  |  |  |  |  |  |  |  |  |
RIFA, maximum investment amount |  |  |  |  |  |  | $ 100,000 |  |  |  |
RIFA, number of tranches | tranche |  |  |  |  |  |  | 4 |  |  |  |
RIFA, initial investment amount |  |  |  |  |  | $ 32,500 |  |  |  |  |
RIFA, Hard Cap percentage |  |  |  |  |  |  | 175 |  |  |  |
RIFA, internal rate of return |  |  |  |  |  |  | 18.00% |  |  |  |
Percentage of investment amount to be repaid on final approval |  |  |  |  |  |  | 100 |  |  |  |
Percentage of investment amount to be paid |  |  |  |  |  |  | 100 |  |  |  |
Minimum cash and cash equivalents required to be maintained during next year |  |  |  |  |  |  | $ 7,500 |  |  |  |
Minimum cash and cash equivalents required to be maintained after December 31, 2024 |  |  |  |  |  |  | 15,000 |  |  |  |
RIFA, total amount funded |  |  |  |  |  |  |  |  | 42,500 |  |
Issuance costs |  |  |  |  |  |  |  |  | $ 900 |  |
Effective annual interest rate |  |  |  |  |  |  |  |  | 12.30% |  |
Revenue Interest Financing Agreement | On First $250 Million of Annual Net Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue Interest Financing Payable |  |  |  |  |  |  |  |  |  |  |
RIFA, annual net revenue, threshold |  |  |  |  |  |  | $ 250,000 |  |  |  |
Revenue Interest Financing Agreement | On First $250 Million of Annual Net Revenue | Minimum |  |  |  |  |  |  |  |  |  |  |
Revenue Interest Financing Payable |  |  |  |  |  |  |  |  |  |  |
RIFA, percentage of royalty payment on annual net revenue |  |  |  |  |  |  | 3.60% |  |  |  |
Revenue Interest Financing Agreement | On First $250 Million of Annual Net Revenue | Maximum |  |  |  |  |  |  |  |  |  |  |
Revenue Interest Financing Payable |  |  |  |  |  |  |  |  |  |  |
RIFA, percentage of royalty payment on annual net revenue |  |  |  |  |  |  | 10.28% |  |  |  |
Revenue Interest Financing Agreement | On Second $250 Million of Annual Net Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue Interest Financing Payable |  |  |  |  |  |  |  |  |  |  |
RIFA, annual net revenue, threshold |  |  |  |  |  |  | $ 250,000 |  |  |  |
Revenue Interest Financing Agreement | On Second $250 Million of Annual Net Revenue | Minimum |  |  |  |  |  |  |  |  |  |  |
Revenue Interest Financing Payable |  |  |  |  |  |  |  |  |  |  |
RIFA, minimum payment to be made, percentage |  |  |  |  |  |  | 1.44% |  |  |  |
Revenue Interest Financing Agreement | On Second $250 Million of Annual Net Revenue | Maximum |  |  |  |  |  |  |  |  |  |  |
Revenue Interest Financing Payable |  |  |  |  |  |  |  |  |  |  |
RIFA, minimum payment to be made, percentage |  |  |  |  |  |  | 4.11% |  |  |  |
Revenue Interest Financing Agreement | In Excess of $500 Million of Annual Net Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue Interest Financing Payable |  |  |  |  |  |  |  |  |  |  |
RIFA, annual net revenue, threshold |  |  |  |  |  |  | $ 500,000 |  |  |  |
Revenue Interest Financing Agreement | In Excess of $500 Million of Annual Net Revenue | Minimum |  |  |  |  |  |  |  |  |  |  |
Revenue Interest Financing Payable |  |  |  |  |  |  |  |  |  |  |
RIFA, Hard Cap percentage |  |  |  |  |  |  | 0.36 |  |  |  |
Revenue Interest Financing Agreement | In Excess of $500 Million of Annual Net Revenue | Maximum |  |  |  |  |  |  |  |  |  |  |
Revenue Interest Financing Payable |  |  |  |  |  |  |  |  |  |  |
RIFA, Hard Cap percentage |  |  |  |  |  |  | 1.03 |  |  |  |
Revenue Interest Financing Agreement | Funding Amount by December 31, 2026 |  |  |  |  |  |  |  |  |  |  |
Revenue Interest Financing Payable |  |  |  |  |  |  |  |  |  |  |
RIFA, minimum payment to be made, percentage |  |  |  |  |  |  | 60.00% |  |  |  |
Revenue Interest Financing Agreement | Funding Amount by December 31, 2028 |  |  |  |  |  |  |  |  |  |  |
Revenue Interest Financing Payable |  |  |  |  |  |  |  |  |  |  |
RIFA, minimum payment to be made, percentage |  |  |  |  |  |  | 100.00% |  |  |  |
Revenue Interest Financing Agreement | A&R Silicon Valley Bank Term Loan |  |  |  |  |  |  |  |  |  |  |
Revenue Interest Financing Payable |  |  |  |  |  |  |  |  |  |  |
Amount of debt repaid with initial investment from RIFA |  |  |  |  |  | $ 22,200 |  |  |  |  |
Second and Third Amendments to Revenue Interest Financing Agreement |  |  |  |  |  |  |  |  |  |  |
Revenue Interest Financing Payable |  |  |  |  |  |  |  |  |  |  |
Amount moved from fourth tranche to second tranche |  |  |  |  |  |  |  | $ 2,500 |  |  |
Amount to be funded under the second tranche. |  |  |  |  |  |  |  | $ 10,000 |  |  |
Amount funded under the second tranche |  |  |  |  | $ 10,000 |  |  |  |  |  |
Fourth Amendment to Revenue Interest Financing Agreement |  |  |  |  |  |  |  |  |  |  |
Revenue Interest Financing Payable |  |  |  |  |  |  |  |  |  |  |
Amount to be funded under the second tranche. |  |  |  | 35,000 |  |  |  |  |  |  |
Amount funded under the second tranche |  | $ 25,000 |  |  |  |  |  |  |  |  |
Amount moved from third tranche to second tranche |  |  |  | 25,000 |  |  |  |  |  |  |
Amount to be funded under third tranche |  |  |  | 10,000 |  |  |  |  |  |  |
Amount to be funded under fourth tranche |  |  |  | 22,500 |  |  |  |  |  |  |
Fourth Amendment to Revenue Interest Financing Agreement | Payments Beginning Second Quarter 2024 |  |  |  |  |  |  |  |  |  |  |
Revenue Interest Financing Payable |  |  |  |  |  |  |  |  |  |  |
Quarterly fixed payment amount |  |  |  | 1,000 |  |  |  |  |  |  |
Fourth Amendment to Revenue Interest Financing Agreement | Payments Beginning Third Quarter of 2025 through 2028 |  |  |  |  |  |  |  |  |  |  |
Revenue Interest Financing Payable |  |  |  |  |  |  |  |  |  |  |
Quarterly fixed payment amount |  |  |  | $ 5,800 |  |  |  |  |  |  |

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