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Commitments and Contingencies - Additional Information (Details) - USD ($) | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Mar. 31, 2024 | Mar. 31, 2026 | Mar. 31, 2025 | Dec. 31, 2025
Loss Contingencies [Line Items] |  |  |  |
Prepaid expenses and other current assets |  | $ 7,750,000 |  | $ 7,917,000
Research and development expense |  | 32,716,000 | $ 19,572,000 |
NeuroPace SOW |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Cumulative expense |  | $ 4,500,000 |  |
Period cost covered | 4 years |  |  |
NeuroPace SOW | Maximum |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Payment for service provided | $ 5,800,000 |  |  |

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