Other Balance Sheet Components - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Prepaid Expense and Other Assets, Current [Abstract]
R&D expenses	$ 832	$ 979
Insurance expense	203	591
Software and subscriptions expense	442	337
Variable lease expense	118	118
Federal R&D tax credit receivable	106	108
Other	333	211
Total prepaid expenses and other current assets	$ 2,034	$ 2,344