Significant Contracts	12 Months Ended
Dec. 31, 2021
Significant Contracts Disclosure [Abstract]
Significant Contracts	3. Significant Contracts Distribution, Licensing and Research Agreements The Company has entered into licensing and similar agreements with academic and research organizations. Under the terms of these agreements, the Company has received licenses to technology and patent applications. The Company is required to pay royalties on future sales of products employing the technology or falling under claims of patent applications. Under the Daiichi Sankyo 2003 license, the Company licenses certain patent rights for sapacitabine. The Company is under an obligation to use reasonable endeavors to develop a product and obtain regulatory approval to sell a product and has agreed to pay Daiichi Sankyo an up-front fee, reimbursement for Daiichi Sankyo’s enumerated expenses, milestone payments and royalties on a country-by-country basis. The up-front fee, Phase 3 entry milestone, and certain past reimbursements have been paid. A further $10.0 million in aggregate milestone payments could be payable subject to achievement of all the specific contractual milestones which are primarily related to regulatory approval in various territories, and the Company’s decision to continue with these projects. Royalties are payable in each country for the term of patent protection in the country or for ten years following the first commercial sale of licensed products in the country, whichever is later. If the Company wishes to appoint a third party to develop or commercialize a sapacitabine-based product in Japan, within certain limitations, Daiichi Sankyo must be notified and given a right of first refusal, with the right of first refusal ending sixty days after notification, to develop and/or commercialize in Japan. In general, the license may be terminated by the Company for technical, scientific, efficacy, safety, or commercial reasons on six months’ notice, or twelve months’ notice, if after a launch of a sapacitabine-based product, or by either party for material default. There were no milestones earned in 2020 or 2021. The three-year term of the Clinical Collaboration Agreement, or CCA with The University of Texas MD Anderson Cancer Center, or MD Anderson ended in September 2021, in accordance to its terms. The main objective of the CCA was to clinically evaluate the safety and efficacy of three Cyclacel medicines in patients with hematological malignancies, including chronic lymphocytic leukemias, acute myeloid leukemias, myelodysplastic syndromes and other advanced leukemias. Under the terms of the CCA, MD Anderson conducted four clinical studies and under the risk-sharing agreement MD Anderson assumed the patient costs for all studies and Cyclacel, who is the sponsor, provided investigational drugs and other limited support. The agreement provided that the Company would make certain payments to MD Anderson upon first commercial sale in specific indications studied in the alliance. There were no such payments earned in 2020 or 2021.

Significant Contracts

12 Months Ended

Dec. 31, 2021

Significant Contracts Disclosure [Abstract]

3. Significant Contracts

Distribution, Licensing and Research Agreements

The Company has entered into licensing and similar agreements with academic and research organizations. Under the terms of these agreements, the Company has received licenses to technology and patent applications. The Company is required to pay royalties on future sales of products employing the technology or falling under claims of patent applications.

Under the Daiichi Sankyo 2003 license, the Company licenses certain patent rights for sapacitabine. The Company is under an obligation to use reasonable endeavors to develop a product and obtain regulatory approval to sell a product and has agreed to pay Daiichi Sankyo an up-front fee, reimbursement for Daiichi Sankyo’s enumerated expenses, milestone payments and royalties on a country-by-country basis. The up-front fee, Phase 3 entry milestone, and certain past reimbursements have been paid. A further $10.0 million in aggregate milestone payments could be payable subject to achievement of all the specific contractual milestones which are primarily related to regulatory approval in various territories, and the Company’s decision to continue with these projects. Royalties are payable in each country for the term of patent protection in the country or for ten years following the first commercial sale of licensed products in the country, whichever is later. If the Company wishes to appoint a third party to develop or commercialize a sapacitabine-based product in Japan, within certain limitations, Daiichi Sankyo must be notified and given a right of first refusal, with the right of first refusal ending sixty days after notification, to develop and/or commercialize in Japan. In general, the license may be terminated by the Company for technical, scientific, efficacy, safety, or commercial reasons on six months’ notice, or twelve months’ notice, if after a launch of a sapacitabine-based product, or by either party for material default. There were no milestones earned in 2020 or 2021.

The three-year term of the Clinical Collaboration Agreement, or CCA with The University of Texas MD Anderson Cancer Center, or MD Anderson ended in September 2021, in accordance to its terms. The main objective of the CCA was to clinically evaluate the safety and efficacy of three Cyclacel medicines in patients with hematological malignancies, including chronic lymphocytic leukemias, acute myeloid leukemias, myelodysplastic syndromes and other advanced leukemias. Under the terms of the CCA, MD Anderson conducted four clinical studies and under the risk-sharing agreement MD Anderson assumed the patient costs for all studies and Cyclacel, who is the sponsor, provided investigational drugs and other limited support. The agreement provided that the Company would make certain payments to MD Anderson upon first commercial sale in specific indications studied in the alliance. There were no such payments earned in 2020 or 2021.