Summary of Significant Accounting Policies - Liquidity Matters (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
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| Policies | ||||||
| Net loss | $ 66,969 | $ 100,938 | $ 152,060 | $ 167,874 | ||
| Accumulated deficit | 2,928,082 | 2,928,082 | $ 2,776,022 | |||
| Cash, cash equivalents and restricted cash | 1,091,502 | $ 1,000,021 | 1,091,502 | $ 1,000,021 | 1,076,140 | $ 945,587 |
| Outstanding balance | 80,291 | 80,291 | $ 80,323 | |||
| Collateral amount | 150,000 | 150,000 | ||||
| Remaining borrowing capacity | 20,000 | 20,000 | ||||
| UBS Credit Line | ||||||
| Policies | ||||||
| Outstanding balance | $ 80,300 | $ 80,300 | ||||
| X | ||||||||||
- Definition Amount of cash and cash equivalent, and cash and cash equivalent restricted to withdrawal or usage; attributable to continuing operation. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of assets pledged to secure a debt instrument. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of accumulated undistributed earnings (deficit). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Details
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