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Redeemable Convertible Preferred Stock	9 Months Ended
Sep. 30, 2022
Temporary Equity Disclosure [Abstract]
Redeemable Convertible Preferred Stock	4. Redeemable Convertible Preferred Stock Upon completion of the IPO on August 12, 2021, all of the Company’s then outstanding shares of redeemable convertible preferred stock were converted into an aggregate of 15,345,279 shares of common stock. As of September 30, 2022 and December 31, 2021, the Company had no redeemable convertible preferred stock outstanding. Prior to conversion, the holders of the Series A, Series A-1, and Series B redeemable convertible preferred stock had various rights, preferences, privileges, and restrictions, with respect to voting, dividends, liquidation, and conversion, which are further described in Note 5 Redeemable Convertible Preferred Stock to the consolidated financial statements in the Company's Annual Report on Form 10-K filed with the SEC on March 7, 2022. In March 2021, Series A-1 preferred stockholders exercised their tranche rights in connection with milestone achievements related to Phase 1 clinical trial results of ETX-155. As a result, the Company issued an additional 4,358,972 shares of Series A-1 redeemable convertible preferred shares for gross proceeds of $34.0 million. Upon exercise of the tranche rights, the Company reclassified the $12.3 million in preferred stock tranche liability to Series A-1 redeemable convertible preferred stock on the consolidated balance sheet. In May 2021, the Company issued 3,846,150 shares of Series B redeemable convertible preferred stock for gross proceeds of $60.0 million. As of September 30, 2022 and 2021, the Company had no dividends in arrears as all shares of redeemable convertible preferred stock converted to common stock upon the completion of the IPO.

Redeemable Convertible Preferred Stock

9 Months Ended

Sep. 30, 2022

Temporary Equity Disclosure [Abstract]

4. Redeemable Convertible Preferred Stock

Upon completion of the IPO on August 12, 2021, all of the Company’s then outstanding shares of redeemable convertible preferred stock were converted into an aggregate of 15,345,279 shares of common stock. As of September 30, 2022 and December 31, 2021, the Company had no redeemable convertible preferred stock outstanding.

Prior to conversion, the holders of the Series A, Series A-1, and Series B redeemable convertible preferred stock had various rights, preferences, privileges, and restrictions, with respect to voting, dividends, liquidation, and conversion, which are further described in Note 5 Redeemable Convertible Preferred Stock to the consolidated financial statements in the Company's Annual Report on Form 10-K filed with the SEC on March 7, 2022.

In March 2021, Series A-1 preferred stockholders exercised their tranche rights in connection with milestone achievements related to Phase 1 clinical trial results of ETX-155. As a result, the Company issued an additional 4,358,972 shares of Series A-1 redeemable convertible preferred shares for gross proceeds of $34.0 million. Upon exercise of the tranche rights, the Company reclassified the $12.3 million in preferred stock tranche liability to Series A-1 redeemable convertible preferred stock on the consolidated balance sheet.

In May 2021, the Company issued 3,846,150 shares of Series B redeemable convertible preferred stock for gross proceeds of $60.0 million.

As of September 30, 2022 and 2021, the Company had no dividends in arrears as all shares of redeemable convertible preferred stock converted to common stock upon the completion of the IPO.