Commitments and Contingencies	12 Months Ended
Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	16. Commitments and Contingencies License Agreements Incyte – In September 2021, the Company entered into the Incyte Agreement and Incyte Stock Purchase Agreement. Under the terms of the Incyte Agreement, Incyte will receive exclusive commercialization rights of axatilimab outside of the United States. In the United States, Incyte and the Company will co-commercialize axatilimab, with the Company having the right to co-promote the product with Incyte. In exchange for these rights, Incyte agreed to pay a non-refundable cash payment of $117 million and in addition a $35 million equity investment. In certain cases, the Company is required to assist Incyte and is responsible for 45% of development costs associated with global and U.S. specific clinical trials. Eddingpharm—In April 2013, the Company entered into a License and Development Agreement (the “Eddingpharm License Agreement”) and a Series B-1 purchase agreement (the “Eddingpharm Purchase Agreement”) with Eddingpharm International Company Limited (“Eddingpharm”). Under the terms of the Eddingpharm License Agreement, Eddingpharm, in exchange for rights to develop and commercialize entinostat in China and certain other Asian countries, purchased $5.0 million of Series B-1 and agreed to make certain contingent milestone and royalty payments based on revenue targets. In certain cases, the Company is required to assist Eddingpharm, and Eddingpharm is required to reimburse the Company for any out-of-pocket expenses incurred in providing this assistance, including reimbursement for person-hours above a certain cap. From time to time, the Company may be subject to various claims and proceedings in the ordinary course of business. If the potential loss from any claim, asserted or unasserted, or proceeding is considered probable and the amount is reasonably estimable, the Company will accrue a liability for the estimated loss. There were no contingent liabilities recorded as of December 31, 2023, or 2022.

Commitments and Contingencies

12 Months Ended

Dec. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

16. Commitments and Contingencies

License Agreements

Incyte – In September 2021, the Company entered into the Incyte Agreement and Incyte Stock Purchase Agreement. Under the terms of the Incyte Agreement, Incyte will receive exclusive commercialization rights of axatilimab outside of the United States. In the United States, Incyte and the Company will co-commercialize axatilimab, with the Company having the right to co-promote the product with Incyte. In exchange for these rights, Incyte agreed to pay a non-refundable cash payment of $117 million and in addition a $35 million equity investment. In certain cases, the Company is required to assist Incyte and is responsible for 45% of development costs associated with global and U.S. specific clinical trials.

Eddingpharm—In April 2013, the Company entered into a License and Development Agreement (the “Eddingpharm License Agreement”) and a Series B-1 purchase agreement (the “Eddingpharm Purchase Agreement”) with Eddingpharm International Company Limited (“Eddingpharm”). Under the terms of the Eddingpharm License Agreement, Eddingpharm, in exchange for rights to develop and commercialize entinostat in China and certain other Asian countries, purchased $5.0 million of Series B-1 and agreed to make certain contingent milestone and royalty payments based on revenue targets. In certain cases, the Company is required to assist Eddingpharm, and Eddingpharm is required to reimburse the Company for any out-of-pocket expenses incurred in providing this assistance, including reimbursement for person-hours above a certain cap.

From time to time, the Company may be subject to various claims and proceedings in the ordinary course of business. If the potential loss from any claim, asserted or unasserted, or proceeding is considered probable and the amount is reasonably estimable, the Company will accrue a liability for the estimated loss. There were no contingent liabilities recorded as of December 31, 2023, or 2022.