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v3.25.1

Segment Reporting - Schedule of Segment Expenses, Other Segment Items, and Segment Net Loss (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Research and development expense | $ 30,914 | $ 18,873
General and administrative expense | 9,138 | 7,989
Other income, net | 188 | 3
Condensed consolidated net loss | (39,282) | (24,303)
Operating segment [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Other segment items | 8,467 | 4,644
Other income, net | (770) | (2,559)
Condensed consolidated net loss | (39,282) | (24,303)
Operating segment [Member] | SGT-003 [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Research and development expense | 9,166 | 1,906
Operating segment [Member] | SGT-501 [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Research and development expense | 4,466 | 3,807
Operating segment [Member] | External Research and Development Other [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Research and development expense, other | 2,770 | 2,728
Operating segment [Member] | Internal Research and Development Expense [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Research and development expense | 6,843 | 5,377
Operating segment [Member] | External General and Administrative Expense [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
General and administrative expense | 4,877 | 5,434
Operating segment [Member] | Internal General and Administrative Expense [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
General and administrative expense | $ 3,463 | $ 2,966

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