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Fair Value Measurements - Inputs (Details) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2024 USD ($) $ / shares Y | Jun. 30, 2024 USD ($) $ / shares Y | Mar. 31, 2024 $ / shares | Mar. 25, 2024 USD ($) Y $ / shares | Mar. 20, 2024 $ / shares | Dec. 31, 2023 USD ($) $ / shares Y | Dec. 05, 2023 $ / shares | Dec. 31, 2022 Y $ / shares | Apr. 19, 2022 USD ($) $ / shares
Fair value inputs |  |  |  |  |  |  |  |  |
Warrant derivative liability | $ | $ 9,186 | $ 9,186 |  |  |  | $ 1,905 |  |  |
Credit Agreement |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Fair value debt | $ | 87,503 | 87,503 |  |  |  | 88,210 |  |  |
2024 Warrants |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Fair value warrant classified as equity | $ | $ 224 | $ 224 |  |  |  |  |  |  |
Exercise price (in dollars per share) |  |  |  |  | $ 3.0723 |  |  |  |
2023 Warrants |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Fair value warrant classified as equity | $ |  |  |  |  |  | $ 200 |  |  |
Exercise price (in dollars per share) |  |  |  |  |  |  | $ 3.6452 |  |
Original Warrants, Issued April 2022 |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Fair value warrant classified as equity | $ |  |  |  |  |  |  |  |  | $ 3,245
Exercise price (in dollars per share) |  |  |  |  |  |  | $ 3.6452 |  | $ 20.04
Warrants 2024, Accompanying Warrants |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Fair value of grants per share | $ 1.28 | $ 1.28 |  | $ 2.81 |  |  |  |  |
Warrant derivative liability | $ | $ 7,626 | $ 7,626 |  | $ 19,347 |  |  |  |  |
Fair value adjustment warrants | $ | $ (11,779) | $ (11,721) |  |  |  |  |  |  |
Warrants 2024, Pre Funded Warrants |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Exercise price (in dollars per share) |  |  | $ 0.001 |  |  |  |  |  |
Strike price | Equity Investment Rights |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input | 1.100 | 1.100 |  |  |  |  |  |  |
Strike price | 2024 Warrants |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input | 3.0723 | 3.0723 |  |  |  |  |  |  |
Strike price | 2023 Warrants |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input |  |  |  |  |  | 3.6452 |  |  |
Strike price | Original Warrants, Issued April 2022 |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input |  |  |  |  |  |  |  | 20.04 |
Strike price | Warrants 2024, Accompanying Warrants |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Exercise price (in dollars per share) | $ 3.20 | $ 3.20 |  | $ 3.20 |  |  |  |  |
Volatility (annual) | Equity Investment Rights |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input | 1.123 | 1.123 |  |  |  |  |  |  |
Volatility (annual) | OnkosXcel Warrants |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input | 1.10 | 1.10 |  |  |  |  |  |  |
Volatility (annual) | 2024 Warrants |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input | 1.122 | 1.122 |  |  |  |  |  |  |
Volatility (annual) | 2023 Warrants |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input |  |  |  |  |  | 0.99 |  |  |
Volatility (annual) | Original Warrants, Issued April 2022 |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input |  |  |  |  |  |  |  | 0.95 |
Volatility (annual) | Warrants 2024, Accompanying Warrants |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input | 1.123 | 1.123 |  | 1.122 |  |  |  |  |
Probability of exercise | Equity Investment Rights |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input | 0.908 | 0.908 |  |  |  |  |  |  |
Time period | Equity Investment Rights |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input | Y | 2.8 | 2.8 |  |  |  |  |  |  |
Time period | 2024 Warrants |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input | Y | 5.1 | 5.1 |  |  |  |  |  |  |
Time period | 2023 Warrants |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input | Y |  |  |  |  |  | 5.4 |  |  |
Time period | Original Warrants, Issued April 2022 |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input | Y |  |  |  |  |  |  |  | 7 |
Time period | Warrants 2024, Accompanying Warrants |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input | Y | 4.7 | 4.7 |  | 5 |  |  |  |  |
Estimated premium to 30-day average | Equity Investment Rights |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input | 0.260 | 0.260 |  |  |  |  |  |  |
Discount rate | Equity Investment Rights |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input | 0.049 | 0.049 |  |  |  |  |  |  |
Risk-free rate | 2024 Warrants |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input | 0.0425 | 0.0425 |  |  |  |  |  |  |
Risk-free rate | 2023 Warrants |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input |  |  |  |  |  | 0.0414 |  |  |
Risk-free rate | Original Warrants, Issued April 2022 |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input |  |  |  |  |  |  |  | 0.0295 |
Risk-free rate | Warrants 2024, Accompanying Warrants |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input | 0.043 | 0.043 |  | 0.042 |  |  |  |  |
Share price input | 2024 Warrants |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input | 2.78 | 2.78 |  |  |  |  |  |  |
Share price input | 2023 Warrants |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input |  |  |  |  |  | 3.71 |  |  |
Share price input | Original Warrants, Issued April 2022 |  |  |  |  |  |  |  |  |
Fair value inputs |  |  |  |  |  |  |  |  |
Derivative liability input |  |  |  |  |  |  |  | 14.93 |

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