Licensing Agreements	6 Months Ended
Jun. 30, 2022
License Agreements [Abstract]
Licensing Agreements	5. Licensing Agreements The University of Chicago Agreement In April 2020, the Company entered into a license agreement (the “University License Agreement”), as well as a sponsored research agreement, with the University of Chicago (the “University”). Under the terms of the license, the Company has the global right to develop and commercialize products that are covered by a valid claim of a licensed patent, incorporate or use the licensed know-how and materials or are known to assess, modulate or utilize the activity of certain specified biological targets. In partial consideration for the license from the University, the Company issued to the University 48,919 shares of its Common Stock in 2020. Further, pursuant to the University License Agreement, the Company is obligated to pay to the University, the future contingent payments including development, regulatory and commercial milestones as well as running royalties on net sales of licensed products at varying rates. The Company assessed the milestone and royalty events involving the University as of June 30, 2022 and concluded no such amounts were due. Pfizer, Inc. Agreement In December 2020, the Company entered into a license agreement (as amended, the “Pfizer License Agreement”) with Pfizer, Inc. (“Pfizer”) for worldwide development and commercialization rights to antibody drug conjugate ("ADC") product candidates directed to certain licensed targets, including PYX-201 and PYX-203, and products containing the ADC product candidates. The Company’s rights are exclusive with respect to certain patents owned or controlled by Pfizer covering the licensed ADCs. Pfizer has also granted the Company a non-exclusive license to use Pfizer’s ADC technology platform to develop and commercialize the licensed ADCs and licensed products. The initial licensed targets include CD123 and extra domain B (EBD of fibronectin) and the Company has the option to expand the scope of its license to add additional licensed targets that have not been licensed to a third party or are not the subject of a Pfizer ADC development program. The Pfizer License Agreement became effective in March 2021. During the three months ended March 31, 2021, the Company paid a combined $25.0 million for the license fee, which was recorded as research and development expenses, consisting of an upfront fee equal to a cash payment of $5.0 million and the issuance of 12,152,145 shares of Series B convertible preferred stock with a value of $20.0 million to Pfizer. Further, pursuant to the Pfizer License Agreement, the Company is obligated to pay the future contingent payments including development, regulatory and commercial milestones as well as running royalties on net sales of licensed products at varying rates. The Company assessed the milestone and royalty events involving Pfizer as of June 30, 2022 and concluded no such amounts were due. LegoChem Biosciences, Inc. Agreements In December 2020, the Company entered into a license agreement (the “LegoChem License Agreement”) and an opt-in, investment and additional consideration agreement (the “Opt-In Agreement”) with LegoChem Biosciences, Inc. (“LegoChem”). Pursuant to the LegoChem License Agreement, the Company obtained worldwide (other than Korea) license for development and commercialization rights for LCB67, an ADC product candidate targeting DLK-1, and products containing the licensed compound. The Company paid $9.0 million in March 2021 to LegoChem, which was recorded as research and development expenses. Pursuant to the LegoChem License Agreement, the Company may purchase certain initial quantities of licensed product from LegoChem for an estimated cost of $7.0 million. No amounts were due and payable related to the manufacturing of the initial quantities of licensed product as of June 30, 2022. Further, pursuant to the LegoChem License Agreement, the Company is obligated to pay the future contingent payments including development, regulatory and commercial milestones as well as running royalties on net sales of licensed products at varying rates. In addition, as part of the Opt-in Agreement, LegoChem had an option to pay $8.0 million to the Company, in exchange for the right to receive a milestone payment (the “Extra Milestone Payment”) of $9.6 million upon the earliest to occur of certain events, including the date of pricing or offer of the first public offering of its common stock or if the Company is the subject of a change in control transaction. The Company determined that the Extra Milestone Payment met the definition and recognition condition of derivative under ASC 815, “Derivatives and Hedging” for which there was a binding contract and firm commitment in January 2021. An initial derivative liability was recognized for $3.4 million with an offset to research and development expenses in January 2021. The derivative liability was re-measured at each reporting date, with changes recorded in “Other income (expense)” in the unaudited condensed consolidated statements of operations and comprehensive loss. The Company recorded a fair value adjustment to the derivative liability of $2.2 million and $3.3 million for the three and six months ended June 30, 2021. The Company settled its derivative liability by paying the Extra Milestone Payment of $9.6 million to LegoChem in January 2022. The Company assessed the milestone and royalty events involving LegoChem as of June 30, 2022 and concluded no such amounts were due. License Agreement with Biosion USA, Inc. On March 28, 2022, the Company entered into a license agreement, or the “Biosion License Agreement,” with Biosion USA, Inc., or Biosion, pursuant to which the Company obtained exclusive, worldwide (other than Greater China (mainland China, Hong Kong, Macau and Taiwan)), licenses for development, manufacture and commercialization rights for BSI-060T, a Siglec-15 targeting antibody, an IO product candidate (now referred to as PYX-106), and products containing the licensed compound. Pursuant to the Biosion License Agreement, the Company paid upfront license fee of $10 million, which was recorded as research and development expenses. The Company is also obligated to pay future contingent payments including development, regulatory and commercial milestones up to an aggregate of $217.5 million in case of normal approval and $222.5 million in case of accelerated approval. Additionally, if products are launched, the Company will pay Biosion tiered royalties on net sales of licensed products in varying royalty rates ranging from low single digits to low teens. The Company’s royalty obligations apply on a licensed product-by-licensed product and country-by-country basis from first commercial sale until the latest to occur of: (1) 12 years from first commercial sale; (2) the expiration of all regulatory or data exclusivity; and (3) the expiration of the last valid claim of a licensed patent covering the licensed product in a country. The Company assessed the milestone and royalty events involving Biosion as of June 30, 2022 and concluded no such amounts were due.

Licensing Agreements

6 Months Ended

Jun. 30, 2022

5. Licensing Agreements

The University of Chicago Agreement

In April 2020, the Company entered into a license agreement (the “University License Agreement”), as well as a sponsored research agreement, with the University of Chicago (the “University”). Under the terms of the license, the Company has the global right to develop and commercialize products that are covered by a valid claim of a licensed patent, incorporate or use the licensed know-how and materials or are known to assess, modulate or utilize the activity of certain specified biological targets. In partial consideration for the license from the University, the Company issued to the University 48,919 shares of its Common Stock in 2020.

Further, pursuant to the University License Agreement, the Company is obligated to pay to the University, the future contingent payments including development, regulatory and commercial milestones as well as running royalties on net sales of licensed products at varying rates. The Company assessed the milestone and royalty events involving the University as of June 30, 2022 and concluded no such amounts were due.

Pfizer, Inc. Agreement

In December 2020, the Company entered into a license agreement (as amended, the “Pfizer License Agreement”) with Pfizer, Inc. (“Pfizer”) for worldwide development and commercialization rights to antibody drug conjugate ("ADC") product candidates directed to certain licensed targets, including PYX-201 and PYX-203, and products containing the ADC product candidates. The Company’s rights are exclusive with respect to certain patents owned or controlled by Pfizer covering the licensed ADCs. Pfizer has also granted the Company a non-exclusive license to use Pfizer’s ADC technology platform to develop and commercialize the licensed ADCs and licensed products. The initial licensed targets include CD123 and extra domain B (EBD of fibronectin) and the Company has the option to expand the scope of its license to add additional licensed targets that have not been licensed to a third party or are not the subject of a Pfizer ADC development program. The Pfizer License Agreement became effective in March 2021. During the three months ended March 31, 2021, the Company paid a combined $25.0 million for the license fee, which was recorded as research and development expenses, consisting of an upfront fee equal to a cash payment of $5.0 million and the issuance of 12,152,145 shares of Series B convertible preferred stock with a value of $20.0 million to Pfizer.

Further, pursuant to the Pfizer License Agreement, the Company is obligated to pay the future contingent payments including development, regulatory and commercial milestones as well as running royalties on net sales of licensed products at varying rates. The Company assessed the milestone and royalty events involving Pfizer as of June 30, 2022 and concluded no such amounts were due.

LegoChem Biosciences, Inc. Agreements

In December 2020, the Company entered into a license agreement (the “LegoChem License Agreement”) and an opt-in, investment and additional consideration agreement (the “Opt-In Agreement”) with LegoChem Biosciences, Inc. (“LegoChem”). Pursuant to the LegoChem License Agreement, the Company obtained worldwide (other than Korea) license for development and commercialization rights for LCB67, an ADC product candidate targeting DLK-1, and products containing the licensed compound. The Company paid $9.0 million in March 2021 to LegoChem, which was recorded as research and development expenses. Pursuant to the LegoChem License Agreement, the Company may purchase certain initial quantities of licensed product from LegoChem for an estimated cost of $7.0 million. No amounts were due and payable related to the manufacturing of the initial quantities of licensed product as of June 30, 2022. Further, pursuant to the LegoChem License Agreement, the Company is obligated to pay the future contingent payments including development, regulatory and commercial milestones as well as running royalties on net sales of licensed products at varying rates.

In addition, as part of the Opt-in Agreement, LegoChem had an option to pay $8.0 million to the Company, in exchange for the right to receive a milestone payment (the “Extra Milestone Payment”) of $9.6 million upon the earliest to occur of certain events, including the date of pricing or offer of the first public offering of its common stock or if the Company is the subject of a change in control transaction. The Company determined that the Extra Milestone Payment met the definition and recognition condition of derivative under ASC 815, “Derivatives and Hedging” for which there was a binding contract and firm commitment in January 2021. An initial derivative liability was recognized for $3.4 million with an offset to research and development expenses in January 2021. The derivative liability was re-measured at each reporting date, with changes recorded in “Other income (expense)” in the unaudited condensed consolidated statements of operations and comprehensive loss. The Company recorded a fair value adjustment to the derivative liability of $2.2 million and $3.3 million for the three and six months ended June 30, 2021. The Company settled its derivative liability by paying the Extra Milestone Payment of $9.6 million to LegoChem in January 2022.

The Company assessed the milestone and royalty events involving LegoChem as of June 30, 2022 and concluded no such amounts were due.

License Agreement with Biosion USA, Inc.

On March 28, 2022, the Company entered into a license agreement, or the “Biosion License Agreement,” with Biosion USA, Inc., or Biosion, pursuant to which the Company obtained exclusive, worldwide (other than Greater China (mainland China, Hong Kong, Macau and Taiwan)), licenses for development, manufacture and commercialization rights for BSI-060T, a Siglec-15 targeting antibody, an IO product candidate (now referred to as PYX-106), and products containing the licensed compound.

Pursuant to the Biosion License Agreement, the Company paid upfront license fee of $10 million, which was recorded as research and development expenses. The Company is also obligated to pay future contingent payments including development, regulatory and commercial milestones up to an aggregate of $217.5 million in case of normal approval and $222.5 million in case of accelerated approval. Additionally, if products are launched, the Company will pay Biosion tiered royalties on net sales of licensed products in varying royalty rates ranging from low single digits to low teens. The Company’s royalty obligations apply on a licensed product-by-licensed product and country-by-country basis from first commercial sale until the latest to occur of: (1) 12 years from first commercial sale; (2) the expiration of all regulatory or data exclusivity; and (3) the expiration of the last valid claim of a licensed patent covering the licensed product in a country.

The Company assessed the milestone and royalty events involving Biosion as of June 30, 2022 and concluded no such amounts were due.