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Fair Value Measurements - Financial Assets & Liabilities Measured At Fair Value On Recurring Basis (Details) - Fair Value, Recurring - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Assets: |  |
Total assets | $ 237,336 | $ 248,350
Cash Equivalents |  |
Assets: |  |
Total assets | 24,276 | 47,709
Cash Equivalents | Money Market Fund |  |
Assets: |  |
Total assets | 24,276 | 40,241
Cash Equivalents | Commercial Paper |  |
Assets: |  |
Total assets |  | 7,468
Marketable Securities |  |
Assets: |  |
Total assets | 213,060 | 200,641
Marketable Securities | Commercial Paper |  |
Assets: |  |
Total assets | 132,436 | 118,465
Marketable Securities | Asset Backed Securities |  |
Assets: |  |
Total assets | 6,368 | 14,968
Marketable Securities | U.S. Treasury Securities |  |
Assets: |  |
Total assets | 20,762 |
Marketable Securities | U.S. government agency securities |  |
Assets: |  |
Total assets | 34,674 | 67,208
Marketable Securities | Corporate Debt Securities |  |
Assets: |  |
Total assets | 18,820 |
Level 1 |  |
Assets: |  |
Total assets | 45,038 | 40,241
Level 1 | Cash Equivalents |  |
Assets: |  |
Total assets | 24,276 | 40,241
Level 1 | Cash Equivalents | Money Market Fund |  |
Assets: |  |
Total assets | 24,276 | 40,241
Level 1 | Marketable Securities |  |
Assets: |  |
Total assets | 20,762 |
Level 1 | Marketable Securities | U.S. Treasury Securities |  |
Assets: |  |
Total assets | 20,762 |
Level 2 |  |
Assets: |  |
Total assets | 192,298 | 208,109
Level 2 | Cash Equivalents |  |
Assets: |  |
Total assets |  | 7,468
Level 2 | Cash Equivalents | Commercial Paper |  |
Assets: |  |
Total assets |  | 7,468
Level 2 | Marketable Securities |  |
Assets: |  |
Total assets | 192,298 | 200,641
Level 2 | Marketable Securities | Commercial Paper |  |
Assets: |  |
Total assets | 132,436 | 118,465
Level 2 | Marketable Securities | Asset Backed Securities |  |
Assets: |  |
Total assets | 6,368 | 14,968
Level 2 | Marketable Securities | U.S. government agency securities |  |
Assets: |  |
Total assets | 34,674 | $ 67,208
Level 2 | Marketable Securities | Corporate Debt Securities |  |
Assets: |  |
Total assets | $ 18,820 |

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