Common Stock - Summary of Reserved Shares of Common Stock (Detail) - shares	Sep. 30, 2022	Dec. 31, 2021	Sep. 23, 2020
Exercise of common stock warrants	461,600	71,544
Exercise of options to purchase common stock	4,680,473	3,681,793
Shares available for issuance under equity incentive plans	2,390,982	2,132,067
Total	7,723,943	5,885,404
Shares available for issuance under employee stock purchase plan [Member]
Total	190,888	0	280,000
Exercise of options to purchase common stock [Member]
Exercise of options to purchase common stock	4,680,473	3,681,793

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21475-112644

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Aggregate number of common shares reserved for future issuance.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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-Publisher FASB
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-SubTopic 10
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-Paragraph 2
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Number of options outstanding, including both vested and non-vested options.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
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