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Segment - Summary of Reconciles Reported Revenues to Net (Loss) Income under Significant Expense Principle (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2026 | Mar. 31, 2025
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Collaboration revenue | $ 20,000 | $ 0
Research and development expenses | 32,716 | 19,572
Selling, general and administrative expense | 11,499 | 7,536
Loss from operations | (24,215) | (27,108)
Interest income | 4,358 | 3,045
Net loss | (19,857) | (24,063)
RAP-219 Program External Expenses |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Research and development expenses | 15,821 | 7,963
Preclinical Programs External Expenses |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Research and development expenses | 4,289 | 3,246
R & D Personnel-Related Costs (Including Stock-based Compensation) |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Research and development expenses | 10,640 | 6,786
Other Costs |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Research and development expenses | 1,966 | 1,577
G & A Personnel Related Costs (Including Stock-based Compensation) |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Selling, general and administrative expense | 6,983 | 4,959
Professional and Consulting Costs |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Selling, general and administrative expense | 3,672 | 1,664
Facility Related and Other |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Selling, general and administrative expense | $ 844 | $ 913

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