Basis of Presentation, Summary of Significant Accounting Policies and Recent Accounting Pronouncements - Summary of Fair Value Measurements, Recurring and Nonrecurring (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets included in:
Fair value	$ 224,856	$ 36,758
Liabilities included in:
Fair value		5,413
Commercial Paper [Member] | Marketable Debt Securities [Member]
Assets included in:
Fair value	47,939
Corporate Debt Securities [Member] | Marketable Debt Securities [Member]
Assets included in:
Fair value	24,694
Asset-backed Securities [Member] | Marketable Debt Securities [Member]
Assets included in:
Fair value	19,143
US Treasury Securities [Member] | Marketable Debt Securities [Member]
Assets included in:
Fair value	11,918
Preferred stock tranche rights liability [Member]
Liabilities included in:
Fair value		5,033
Preferred stock warrant liability [Member]
Liabilities included in:
Fair value		380
Cash and Cash Equivalents [Member] | Money Market Funds [Member]
Assets included in:
Fair value	121,162	36,758
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets included in:
Fair value	121,162	36,758
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Cash and Cash Equivalents [Member] | Money Market Funds [Member]
Assets included in:
Fair value	121,162	36,758
Significant Other Observable Inputs (Level 2) [Member]
Assets included in:
Fair value	103,694
Significant Other Observable Inputs (Level 2) [Member] | Commercial Paper [Member] | Marketable Debt Securities [Member]
Assets included in:
Fair value	47,939
Significant Other Observable Inputs (Level 2) [Member] | Corporate Debt Securities [Member] | Marketable Debt Securities [Member]
Assets included in:
Fair value	24,694
Significant Other Observable Inputs (Level 2) [Member] | Asset-backed Securities [Member] | Marketable Debt Securities [Member]
Assets included in:
Fair value	19,143
Significant Other Observable Inputs (Level 2) [Member] | US Treasury Securities [Member] | Marketable Debt Securities [Member]
Assets included in:
Fair value	11,918
Significant Unobservable Inputs (Level 3) [Member]
Assets included in:
Fair value	0
Liabilities included in:
Fair value		5,413
Significant Unobservable Inputs (Level 3) [Member] | Commercial Paper [Member] | Marketable Debt Securities [Member]
Assets included in:
Fair value	0
Significant Unobservable Inputs (Level 3) [Member] | Corporate Debt Securities [Member] | Marketable Debt Securities [Member]
Assets included in:
Fair value	0
Significant Unobservable Inputs (Level 3) [Member] | Asset-backed Securities [Member] | Marketable Debt Securities [Member]
Assets included in:
Fair value	0
Significant Unobservable Inputs (Level 3) [Member] | US Treasury Securities [Member] | Marketable Debt Securities [Member]
Assets included in:
Fair value	0
Significant Unobservable Inputs (Level 3) [Member] | Preferred stock tranche rights liability [Member]
Liabilities included in:
Fair value		5,033
Significant Unobservable Inputs (Level 3) [Member] | Preferred stock warrant liability [Member]
Liabilities included in:
Fair value		$ 380
Significant Unobservable Inputs (Level 3) [Member] | Cash and Cash Equivalents [Member] | Money Market Funds [Member]
Assets included in:
Fair value	$ 0