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Cash and Cash Equivalents, Restricted Cash and Investments - Schedule of Cash and Cash Equivalents and Investments (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Fair Value |  |
Estimated Fair Value | $ 66,294 | $ 171,301
Total cash and cash equivalents, restricted cash and short-term investments |  |
Fair Value |  |
Amortized Cost | 144,921 | 237,839
Gross Unrealized Gains | 33 | 136
Gross Unrealized Losses | (4) | (18)
Estimated Fair Value | 144,950 | 237,957
Cash and Restricted Cash |  |
Fair Value |  |
Amortized Cost | 78,656 | 66,656
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 78,656 | 66,656
Cash and cash equivalents |  |
Fair Value |  |
Amortized Cost | 49,656 | 66,656
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 49,656 | 66,656
Restricted Cash |  |
Fair Value |  |
Amortized Cost | 29,000 | 0
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 29,000 | 0
Total short-term investments |  |
Fair Value |  |
Amortized Cost | 66,265 | 171,183
Gross Unrealized Gains | 33 | 136
Gross Unrealized Losses | (4) | (18)
Estimated Fair Value | 66,294 | 171,301
U.S. treasury securities |  |
Fair Value |  |
Amortized Cost | 43,223 | 127,884
Gross Unrealized Gains | 24 | 106
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 43,247 | 127,990
Corporate debt securities |  |
Fair Value |  |
Amortized Cost | 23,042 | 43,299
Gross Unrealized Gains | 9 | 30
Gross Unrealized Losses | (4) | (18)
Estimated Fair Value | $ 23,047 | $ 43,311

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