Commitments and Contingencies - Additional Information (Details) - USD ($)		1 Months Ended		12 Months Ended
		Mar. 31, 2024	Nov. 30, 2023	Dec. 31, 2024	Dec. 31, 2023
Loss Contingencies [Line Items]
Prepaid expenses and other current assets				$ 4,417,000	$ 3,309,000
Research and development expense	[1]			60,935,000	27,999,000
NeuroPace Agreement
Loss Contingencies [Line Items]
Master services agreement, expiration period			3 years
Amount paid				600,000
Research and development expense				1,800,000
Balance of prepaid expense				$ 300,000
NeuroPace SOW
Loss Contingencies [Line Items]
Period cost covered		2 years
Prepaid expenses and other current assets					$ 1,500,000
NeuroPace SOW | Maximum
Loss Contingencies [Line Items]
Payment for service provided		$ 3,700,000

[1] Includes related party amounts of less than $0.1 million and $0.7 million for the years ended December 31, 2024 and 2023, respectively (see Note 10).