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Fair Value Measurements - Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Assets: |  |
Available-for-sale securities | $ 127,970 | $ 158,186
Short-term investments | 127,970 | 158,186
U.S. government securities |  |
Assets: |  |
Available-for-sale securities | 127,429 | 157,656
Certificates of deposit |  |
Assets: |  |
Available-for-sale securities | 541 | 530
Fair value measured on recurring basis | U.S. government securities |  |
Assets: |  |
Available-for-sale securities | 127,429 | 157,656
Fair value measured on recurring basis | Convertible promissory notes |  |
Assets: |  |
Available-for-sale securities | 2,372 | 2,330
Fair value measured on recurring basis | Certificates of deposit |  |
Assets: |  |
Short-term investments | 541 | 530
Fair value measured on recurring basis | Embedded derivatives |  |
Assets: |  |
Derivative assets | 2,621 | 4,628
Fair value measured on recurring basis | Commodity swap contracts |  |
Liabilities: |  |
Derivative liabilities |  | 1,875
Fair value measured on recurring basis | Level 1 | U.S. government securities |  |
Assets: |  |
Available-for-sale securities | 127,429 | 157,656
Fair value measured on recurring basis | Level 1 | Convertible promissory notes |  |
Assets: |  |
Available-for-sale securities | 0 | 0
Fair value measured on recurring basis | Level 1 | Certificates of deposit |  |
Assets: |  |
Short-term investments | 0 | 0
Fair value measured on recurring basis | Level 1 | Embedded derivatives |  |
Assets: |  |
Derivative assets | 0 | 0
Fair value measured on recurring basis | Level 1 | Commodity swap contracts |  |
Liabilities: |  |
Derivative liabilities |  | 0
Fair value measured on recurring basis | Level 2 | U.S. government securities |  |
Assets: |  |
Available-for-sale securities | 0 | 0
Fair value measured on recurring basis | Level 2 | Convertible promissory notes |  |
Assets: |  |
Available-for-sale securities | 0 | 0
Fair value measured on recurring basis | Level 2 | Certificates of deposit |  |
Assets: |  |
Short-term investments | 541 | 530
Fair value measured on recurring basis | Level 2 | Embedded derivatives |  |
Assets: |  |
Derivative assets | 0 | 0
Fair value measured on recurring basis | Level 2 | Commodity swap contracts |  |
Liabilities: |  |
Derivative liabilities |  | 0
Fair value measured on recurring basis | Level 3 | U.S. government securities |  |
Assets: |  |
Available-for-sale securities | 0 | 0
Fair value measured on recurring basis | Level 3 | Convertible promissory notes |  |
Assets: |  |
Available-for-sale securities | 2,372 | 2,330
Fair value measured on recurring basis | Level 3 | Certificates of deposit |  |
Assets: |  |
Short-term investments | 0 | 0
Fair value measured on recurring basis | Level 3 | Embedded derivatives |  |
Assets: |  |
Derivative assets | $ 2,621 | 4,628
Fair value measured on recurring basis | Level 3 | Commodity swap contracts |  |
Liabilities: |  |
Derivative liabilities |  | $ 1,875

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