Redeemable Convertible Preferred Stock	3 Months Ended
Mar. 31, 2022
Equity [Abstract]
Redeemable convertible preferred stock	11. Redeemable convertible preferred stock In March 2015, the Company entered into a Series A Preferred Stock Purchase Agreement (“Series A Agreement”) with certain investors pursuant to which it sold and issued 9,799,755 shares of Series A redeemable convertible preferred stock (“Series A shares”) at a purchase price of $0.38 per share in the initial closing. In July 2015, the Company sold and issued an additional 8,166,462 Series A shares at a purchase price of $0.38 per share pursuant to a subsequent closing under the Series A Agreement. In October 2015, the Company sold and issued an additional 14,699,632 Series A shares at a purchase price of $0.38 per share pursuant to a milestone closing under the Series A Agreement. A total of 32,665,849 Series A shares were issued for $12.2 million, net of issuance costs of $89,000. In December 2016, the Company entered into a Series B Preferred Stock Purchase Agreement (“Series B Agreement”) with certain investors pursuant to which it sold and issued 9,888,639 shares of Series B convertible redeemable preferred stock (“Series B shares”) at a purchase price of $0.75 per share in the initial closing. In January 2018, the Company sold and issued an additional 6,110,957 Series B shares at a purchase price of $0.75 per share pursuant to a milestone closing under the Series B Agreement. In September 2018, the Company entered into a Series C Preferred Stock Purchase Agreement (“Series C Agreement”) with certain investors pursuant to which it sold and issued 18,717,804 shares of Series C convertible redeemable preferred stock (“Series C shares” and together with Series A shares, Series B shares and Series C shares, the “2018 Preferred Stock”) at a purchase price of $2.40 per share in the initial closing. In November and December 2018, the Company sold and issued an additional 2,501,265 and 2,084,387 Series C shares, respectively, at a purchase price of $2.40 per share pursuant to subsequent closings under the Series C Agreement. In October 2018, the Company repurchased 2,452,270 Series A shares at a price per share of $2.04 (“Series A Repurchase”), for an aggregate purchase price of $5.0 million. In connection with the Series A Repurchase, the Company filed a Certificate of Retirement with the Secretary of State in the State of Delaware to (i) cancel and retire the repurchased shares as required by the Company’s Amended and Restated Certificate of Incorporation, (ii) reduce the number of 2018 Preferred Stock authorized under the Company’s Amended and Restated Certificate of Incorporation to 70,212,570 from 72,664,850 and (iii) reduce the number of Series A shares authorized under the Company’s Amended and Restated Certificate of Incorporation 30,213,574 from 32,665,849. In October 2020, under the amended and restated certificate of incorporation dated October 22, 2020 (“October COI”), the Company issued 17,752,068 shares of Series D redeemable convertible preferred stock (“Series D shares” and together with Series A shares, Series B shares, Series C shares, the “Preferred Stock”) at a purchase price of $6.76 per share for net proceeds of $119.7 million and authorized the reduction of the Series C to 23,303,456. In July 2021, all of the then-outstanding shares of Preferred Stock automatically converted into 87,268,694 shares of common stock immediately upon the closing of Company’s IPO. The Company classified its Preferred Stock as temporary equity in the accompanying unaudited interim consolidated balance sheets due to terms that allow for redemption of the shares upon certain change in control events that are outside of the Company’s control, including sale or transfer of control of the Company, as holders of the Preferred Stock could cause redemption of the shares in these situations.

Redeemable Convertible Preferred Stock

3 Months Ended

Mar. 31, 2022

11.

Redeemable convertible preferred stock

In March 2015, the Company entered into a Series A Preferred Stock Purchase Agreement (“Series A Agreement”) with certain investors pursuant to which it sold and issued 9,799,755 shares of Series A redeemable convertible preferred stock (“Series A shares”) at a purchase price of $0.38 per share in the initial closing. In July 2015, the Company sold and issued an additional 8,166,462 Series A shares at a purchase price of $0.38 per share pursuant to a subsequent closing under the Series A Agreement. In October 2015, the Company sold and issued an additional 14,699,632 Series A shares at a purchase price of $0.38 per share pursuant to a milestone closing under the Series A Agreement. A total of 32,665,849 Series A shares were issued for $12.2 million, net of issuance costs of $89,000.

In December 2016, the Company entered into a Series B Preferred Stock Purchase Agreement (“Series B Agreement”) with certain investors pursuant to which it sold and issued 9,888,639 shares of Series B convertible redeemable preferred stock (“Series B shares”) at a purchase price of $0.75 per share in the initial closing. In January 2018, the Company sold and issued an additional 6,110,957 Series B shares at a purchase price of $0.75 per share pursuant to a milestone closing under the Series B Agreement.

In September 2018, the Company entered into a Series C Preferred Stock Purchase Agreement (“Series C Agreement”) with certain investors pursuant to which it sold and issued 18,717,804 shares of Series C convertible redeemable preferred stock (“Series C shares” and together with Series A shares, Series B shares and Series C shares, the “2018 Preferred Stock”) at a purchase price of $2.40 per share in the initial closing. In November and December 2018, the Company sold and issued an additional 2,501,265 and 2,084,387 Series C shares, respectively, at a purchase price of $2.40 per share pursuant to subsequent closings under the Series C Agreement.

In October 2018, the Company repurchased 2,452,270 Series A shares at a price per share of $2.04 (“Series A Repurchase”), for an aggregate purchase price of $5.0 million. In connection with the Series A Repurchase, the Company filed a Certificate of Retirement with the Secretary of State in the State of Delaware to (i) cancel and retire the repurchased shares as required by the Company’s Amended and Restated Certificate of Incorporation, (ii) reduce the number of 2018 Preferred Stock authorized under the Company’s Amended and Restated Certificate of Incorporation to 70,212,570 from 72,664,850 and (iii) reduce the number of Series A shares authorized under the Company’s Amended and Restated Certificate of Incorporation 30,213,574 from 32,665,849.

In October 2020, under the amended and restated certificate of incorporation dated October 22, 2020 (“October COI”), the Company issued 17,752,068 shares of Series D redeemable convertible preferred stock (“Series D shares” and together with Series A shares, Series B shares, Series C shares, the “Preferred Stock”) at a purchase price of $6.76 per share for net proceeds of $119.7 million and authorized the reduction of the Series C to 23,303,456.

In July 2021, all of the then-outstanding shares of Preferred Stock automatically converted into 87,268,694 shares of common stock immediately upon the closing of Company’s IPO.

The Company classified its Preferred Stock as temporary equity in the accompanying unaudited interim consolidated balance sheets due to terms that allow for redemption of the shares upon certain change in control events that are outside of the Company’s control, including sale or transfer of control of the Company, as holders of the Preferred Stock could cause redemption of the shares in these situations.