Fair Value Measurements - Summary of Financial Assets and Liabilities Measured at Fair Value On Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Cash equivalents:
Cash equivalents	$ 39,524
Short-term investments:
Short-term investments	34,612
Assets:
Assets		$ 1,009
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities (including $995 for a related party)		1,042
Tranche liability (including $331 for a related party)		365
Total fair value of liabilities		1,407
Money Market Funds
Cash equivalents:
Cash equivalents	19,587
Assets:
Assets		1,009
U.S. Government Treasury Securities
Cash equivalents:
Cash equivalents	19,937
Short-term investments:
Short-term investments	34,612
Level 1
Cash equivalents:
Cash equivalents	39,524
Short-term investments:
Short-term investments	34,612
Assets:
Assets		1,009
Level 1 | Money Market Funds
Cash equivalents:
Cash equivalents	19,587
Assets:
Assets		1,009
Level 1 | U.S. Government Treasury Securities
Cash equivalents:
Cash equivalents	19,937
Short-term investments:
Short-term investments	$ 34,612
Level 3
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities (including $995 for a related party)		1,042
Tranche liability (including $331 for a related party)		365
Total fair value of liabilities		$ 1,407