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Fair Value Measurements - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Detail) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Marketable securities |  |
Total fair value | $ 199,194 | $ 224,856
Fair Value, Inputs, Level 1 [Member] |  |
Marketable securities |  |
Total fair value | 156,540 | 121,162
Fair Value, Inputs, Level 2 [Member] |  |
Marketable securities |  |
Total fair value | 42,654 | 103,694
Fair Value, Inputs, Level 3 [Member] |  |
Marketable securities |  |
Total fair value | 0 | 0
Money Market Securities [Member] |  |
Cash and cash equivalents |  |
Cash and Cash Equivalents, Fair Value Disclosure | 156,540 | 121,162
Money Market Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Cash and cash equivalents |  |
Cash and Cash Equivalents, Fair Value Disclosure | 156,540 | 121,162
Money Market Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Cash and cash equivalents |  |
Cash and Cash Equivalents, Fair Value Disclosure | 0 | 0
Money Market Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Cash and cash equivalents |  |
Cash and Cash Equivalents, Fair Value Disclosure | 0 | 0
Commercial Paper [Member] |  |
Marketable securities |  |
Investments, Fair Value Disclosure |  | 47,939
Commercial Paper [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Marketable securities |  |
Investments, Fair Value Disclosure |  | 47,939
Corporate Debt Securities [Member] |  |
Marketable securities |  |
Investments, Fair Value Disclosure | 16,162 | 24,694
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Marketable securities |  |
Investments, Fair Value Disclosure | 0 |
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Marketable securities |  |
Investments, Fair Value Disclosure | 16,162 | 24,694
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Marketable securities |  |
Investments, Fair Value Disclosure | 0 |
Asset-backed Securities [Member] |  |
Marketable securities |  |
Investments, Fair Value Disclosure | 2,888 | 19,143
Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Marketable securities |  |
Investments, Fair Value Disclosure | 0 |
Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Marketable securities |  |
Investments, Fair Value Disclosure | 2,888 | 19,143
Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Marketable securities |  |
Investments, Fair Value Disclosure | 0 |
US Treasury Securities [Member] |  |
Marketable securities |  |
Investments, Fair Value Disclosure | 23,604 | 11,918
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Marketable securities |  |
Investments, Fair Value Disclosure | 0 |
US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Marketable securities |  |
Investments, Fair Value Disclosure | 23,604 | $ 11,918
US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Marketable securities |  |
Investments, Fair Value Disclosure | $ 0 |

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- Definition 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. + References No definition available. + Details
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- Definition Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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