Fair Value Measurements - Summary of Financial Assets Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financial assets
Available-for-sale marketable securities	$ 188,205	$ 223,336
Recurring [Member]
Financial assets
Total financial assets	209,975	237,197
U.S. Government Agency Obligations [Member]
Financial assets
Available-for-sale marketable securities	11,630	16,975
U.S. Government Agency Obligations [Member] \| Recurring [Member]
Financial assets
Available-for-sale marketable securities	11,630	16,975
Corporate Bonds [Member]
Financial assets
Available-for-sale marketable securities	66,025	66,324
Corporate Bonds [Member] \| Recurring [Member]
Financial assets
Available-for-sale marketable securities	66,025	66,324
Municipal Bonds [Member]
Financial assets
Available-for-sale marketable securities	22,211	21,579
Municipal Bonds [Member] \| Recurring [Member]
Financial assets
Available-for-sale marketable securities	22,211	21,579
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Recurring [Member]
Financial assets
Total financial assets	21,770	13,861
Significant Other Observable Inputs (Level 2) [Member] \| Recurring [Member]
Financial assets
Total financial assets	188,205	223,336
Significant Other Observable Inputs (Level 2) [Member] \| U.S. Government Agency Obligations [Member] \| Recurring [Member]
Financial assets
Available-for-sale marketable securities	11,630	16,975
Significant Other Observable Inputs (Level 2) [Member] \| Corporate Bonds [Member] \| Recurring [Member]
Financial assets
Available-for-sale marketable securities	66,025	66,324
Significant Other Observable Inputs (Level 2) [Member] \| Municipal Bonds [Member] \| Recurring [Member]
Financial assets
Available-for-sale marketable securities	22,211	21,579
Money Market Funds [Member] \| Recurring [Member]
Financial assets
Cash and cash equivalents	21,362	13,453
Restricted cash	408	408
Money Market Funds [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Recurring [Member]
Financial assets
Cash and cash equivalents	21,362	13,453
Restricted cash	408	408
U.S. Treasury Securities [Member] \| Recurring [Member]
Financial assets
Available-for-sale marketable securities	15,550	11,570
U.S. Treasury Securities [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Recurring [Member]
Financial assets
Available-for-sale marketable securities	15,550	11,570
Commercial Paper [Member] \| Recurring [Member]
Financial assets
Available-for-sale marketable securities	72,789	106,888
Commercial Paper [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Recurring [Member]
Financial assets
Available-for-sale marketable securities	$ 72,789	$ 106,888

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as noncurrent. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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