Collaboration Agreements	6 Months Ended
Jun. 30, 2024
Collaboration Agreements [Abstract]
Collaboration Agreements	Note 5. COLLABORATION AGREEMENTS Surface Oncology, Inc. In November 2017, the Company entered into a research collaboration and license option agreement with Surface Oncology, Inc. (“Surface”) to identify and select antibodies against two target antigens, using the Company’s proprietary technology as described in the agreement. Under the agreement, Surface may purchase exclusive options, exercisable by providing a written notice to the Company, to obtain (i) an exclusive product license to make, use, sell and import products incorporating antibodies targeting the first antigen and (ii) an exclusive research tool license to use antibodies targeting the second antigen to perform research. Surface purchased the first option and exercised the second option, and we entered into an exclusive research tool license agreement with Surface in the third quarter of 2019. Under the research collaboration and license option agreement, Surface paid an upfront technology access fee of $250,000 and makes milestone payments upon completion of each of four designated milestones for the first target antigen specified in the agreement. For the second target antigen, Surface is obligated to make payments to the Company based on time incurred by the Company in the conduct of the work plan described in the agreement. Surface is required to reimburse the Company for expenses incurred (i) in the conduct of the work plan as detailed in the research funding budget and (ii) for patent filings and prosecution of the Company’s program intellectual property as described in the agreement. The exercise of each option would also entail a license fee and annual maintenance fees, and in the case of the product license, royalties, and additional milestone payments. This agreement will expire upon the latest of the expiration of both research programs and all evaluation and testing periods. During the six months ended June 30, 2023, the Company recorded $500,000 of revenue for achievement of a milestone event. In 2023 Surface terminated this exclusive research license agreement, for the first target, and therefore will not be required to pay the maintenance fee any longer. Surface Oncology has sublicensed this program for the second target to Coherus BioSciences, Inc. (“Coherus”), which is actively continuing phase 1/2 development of the second target. Coherus has assumed responsibility for the payment of the maintenance fee and other fees contemplated by the research collaboration and license option agreement for the second target.

Collaboration Agreements

6 Months Ended

Jun. 30, 2024

Note 5. COLLABORATION AGREEMENTS

Surface Oncology, Inc.

In November 2017, the Company entered into a research collaboration and license option agreement with Surface Oncology, Inc. (“Surface”) to identify and select antibodies against two target antigens, using the Company’s proprietary technology as described in the agreement. Under the agreement, Surface may purchase exclusive options, exercisable by providing a written notice to the Company, to obtain (i) an exclusive product license to make, use, sell and import products incorporating antibodies targeting the first antigen and (ii) an exclusive research tool license to use antibodies targeting the second antigen to perform research. Surface purchased the first option and exercised the second option, and we entered into an exclusive research tool license agreement with Surface in the third quarter of 2019.

Under the research collaboration and license option agreement, Surface paid an upfront technology access fee of $250,000 and makes milestone payments upon completion of each of four designated milestones for the first target antigen specified in the agreement. For the second target antigen, Surface is obligated to make payments to the Company based on time incurred by the Company in the conduct of the work plan described in the agreement. Surface is required to reimburse the Company for expenses incurred (i) in the conduct of the work plan as detailed in the research funding budget and (ii) for patent filings and prosecution of the Company’s program intellectual property as described in the agreement. The exercise of each option would also entail a license fee and annual maintenance fees, and in the case of the product license, royalties, and additional milestone payments. This agreement will expire upon the latest of the expiration of both research programs and all evaluation and testing periods. During the six months ended June 30, 2023, the Company recorded $500,000 of revenue for achievement of a milestone event. In 2023 Surface terminated this exclusive research license agreement, for the first target, and therefore will not be required to pay the maintenance fee any longer. Surface Oncology has sublicensed this program for the second target to Coherus BioSciences, Inc. (“Coherus”), which is actively continuing phase 1/2 development of the second target. Coherus has assumed responsibility for the payment of the maintenance fee and other fees contemplated by the research collaboration and license option agreement for the second target.