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Royalty Financing Obligation - Activity (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Aug. 01, 2023 | Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Debt Instrument, Increase (Decrease), Net [Roll Forward] |  |  |  |
Accretion of imputed interest expense on royalty financing obligation |  | $ 2,592 | $ 3,259 |
Royalty Financing |  |  |  |
Debt Instrument, Increase (Decrease), Net [Roll Forward] |  |  |  |
Royalty financing obligation – beginning balance |  | 33,490 | $ 0 | $ 0
Receipt of the first tranche of the royalty financing obligation | $ 30,000 | 0 |  | 30,000
Accretion of imputed interest expense on royalty financing obligation |  | 2,592 |  | 3,743
Less: royalty payments made to RTW |  | (730) |  | (253)
Royalty financing obligation – ending balance |  | 35,352 |  | 33,490
Less: royalty payable to RTW classified within accrued expenses |  | (1,019) |  | (730)
Royalty financing obligation, non-current |  | $ 34,333 |  | $ 32,760

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