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Commitment & Contingencies - In-License Agreement for Lotilaner (Details) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended | 31 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2022 | Sep. 30, 2020 | Jan. 31, 2019 | Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023 | Mar. 31, 2023
Intangible Assets, Milestone Payment |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |
Useful life |  |  |  | 10 years |  |  |
License agreement | Elanco |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |
Upfront payment received |  |  | $ 1.0 |  |  |  |
Future cash payments |  |  |  | $ 2.0 |  |  |
Maximum milestone payments |  |  |  | 75.0 |  |  |
Royalty expense |  |  |  | 1.2 |  |  |
Common stock issued for license agreement (shares) |  | 222,460 |  |  |  |  |
Common stock issued for license agreement, value |  | $ 3.1 |  |  |  |  |
Common stock issued for license agreement, share price (usd per share) |  | $ 14.0003 |  |  |  |  |
License agreement | Clinical milestones | Elanco |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |
Contractual milestone payment | $ 0.5 |  |  |  | $ 1.0 |  | $ 4.0
Maximum milestone payments |  |  |  | 4.0 |  |  |
License agreement | Commercial and sales milestones |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |
Maximum milestone payments |  |  |  | $ 77.0 |  |  |
License agreement | Commercial and sales milestones | Elanco |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |
Contractual milestone payment |  |  |  |  |  | $ 4.0 |

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