Stockholders' Equity - Summary of Stock Option Activity (Detail)	6 Months Ended
Jun. 30, 2022 $ / shares shares
Share-Based Payment Arrangement [Abstract]
Number of Outstanding Stock Options, Beginning Balance \| shares	1,412,550
Stock options granted \| shares	1,528,444
Number of Outstanding Stock Options, Exercised \| shares \| shares	(259)
Number of Outstanding Stock Options, Canceled/forfeited/expired \| shares	(13,537)
Number of Outstanding Stock Options, Ending Balance \| shares	2,927,198
Weighted Average Exercise Price, Beginning Balance \| $ / shares	$ 12.01
Weighted Average Exercise Price, Granted \| $ / shares	3.44
Weighted Average Exercise Price, Exercised \| $ / shares \| $ / shares	3.77
Weighted Average Exercise Price, Canceled/forfeited/expired \| $ / shares	18.17
Weighted Average Exercise Price, Ending Balance \| $ / shares	$ 7.51

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- Definition

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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Weighted average price of options that were either forfeited or expired.

+ References

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
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