Fair Value Measurements - Summary of Assumptions Used in Estimating the Fair Value of Preferred Stock Tranche Liability (Detail) - Series B Convertible Preferred Stock Tranche Rights Liability	Jun. 17, 2021 yr	Dec. 31, 2020 yr
Risk-free interest rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative liability, measurement input	0.0007	0.0012
Expected time to Milestone Closing (in years)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative liability, measurement input	0.8	1.3
Probability of achievement of Milestone Closing
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative liability, measurement input	1	0.65