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Summary of Significant Accounting Policies - Schedule of Potentially Dilutive Shares (Detail) - shares | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Anti-dilutive securities (in shares) | 22,493,164 | 24,419,347 | 22,493,164 | 24,419,347
Outstanding stock options |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Anti-dilutive securities (in shares) | 2,842,808 | 1,970,536 | 2,842,808 | 1,970,536
Outstanding restricted stock units |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Anti-dilutive securities (in shares) | 3,263,345 | 400,000 | 3,263,345 | 400,000
December 2020 Public Offering Series 2 | Warrant |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Anti-dilutive securities (in shares) | 0 | 6,800,000 | 0 | 6,800,000
April 2022 Public Offering | Warrant |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Anti-dilutive securities (in shares) | 15,000,000 | 15,000,000 | 15,000,000 | 15,000,000
Warrants to purchase common stock associated with Loan Agreement | Warrant |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Anti-dilutive securities (in shares) | 198,811 | 198,811 | 198,811 | 198,811
Common stock associated with March 2019 Notes |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Anti-dilutive securities (in shares) | 1,138,200 | 0 | 1,138,200 | 0
Warrants to purchase common stock associated with Danforth | Warrant |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Anti-dilutive securities (in shares) | 50,000 | 50,000 | 50,000 | 50,000

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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