Prepaid Expenses, Other Current Assets and Other Noncurrent Assets - Summary of Prepaid Expenses and Other Noncurrent Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Prepaid Expense and Other Assets, Noncurrent [Abstract]
Prepaid external research and development - long term	$ 0	$ 116
Total other noncurrent assets	$ 0	$ 116