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Net Loss Per Share (Tables) | 9 Months Ended | 12 Months Ended
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Sep. 30, 2023 | Dec. 31, 2022
Earnings Per Share [Abstract] |  |
Weighted-Average Equity Instruments Excluded from Calculation of Diluted Net Loss Per Share | The following weighted-average equity instruments were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented:
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Options to purchase common stock |  |  | 3,135,672 |  |  |  | 351,533 |  |  |  | 1,426,224 |  |  |  | 335,395 |
Unvested restricted stock units |  |  | — |  |  |  | 6,000 |  |  |  | 252 |  |  |  | 7,315 |
Series A Preferred Stock (on an as-converted basis) |  |  | 42,501,681 |  |  |  | — |  |  |  | 14,851,447 |  |  |  | — |
| The following weighted-average equity instruments were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented:
|  | Year Ended December 31, |
|  | 2022 |  |  | 2021 |  |  | 2020 |
Options to purchase common stock |  |  | 346,331 |  |  |  | 264,858 |  |  |  | 201,977 |
Unvested restricted stock units |  |  | 6,982 |  |  |  | 7,975 |  |  |  | 4,239 |
Schedule of Reconciliation of Basic and Diluted Net Loss Per Share |  | The following is a reconciliation of the shares used as the denominator for the calculation of basic and diluted net loss per share:
|  | Year Ended December 31, |
|  | 2022 |  |  | 2021 |  |  | 2020 |
Weighted average common shares |  |  | 2,307,668 |  |  |  | 1,956,933 |  |  |  | 1,608,952 |
Weighted average pre-funded warrants |  |  | 1,063,563 |  |  |  | 672,851 |  |  |  | 525,917 |
Total basic and diluted weighted average shares |  |  | 3,371,231 |  |  |  | 2,629,784 |  |  |  | 2,134,869 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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