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Organization of the Company and Basis of Presentation - Subsequent Events (Details)												12 Months Ended
	Mar. 21, 2025 USD ($) $ / shares shares	Mar. 10, 2025 GBP (£)	Feb. 26, 2025 shares	Feb. 11, 2025 $ / shares shares	Feb. 06, 2025	Feb. 05, 2025 USD ($)	Feb. 04, 2025 USD ($) $ / shares	Jan. 31, 2025 USD ($)	Jan. 29, 2025	Jan. 02, 2025 USD ($) $ / shares shares	Dec. 18, 2023	Dec. 31, 2024 $ / shares	Dec. 31, 2023 $ / shares
Subsequent events
Common stock, par value (in dollars per share) | $ / shares												$ 0.001	$ 0.001
Reverse stock split ratio											0.067
Preferred stock, par value (in dollars per share) | $ / shares												$ 0.001	$ 0.001
Subsequent event
Subsequent events
Increase in stockholders' equity due to deconsolidation of subsidiary								$ 5,600,000
Subsequent event | Cyclacel Limited, United Kingdom | Assets Of Cyclacel Limited
Subsequent events
Asset acquisition consideration transferred | £		£ 250,000
Rombotis Settlement Agreement | Subsequent event
Subsequent events
Settlement payment										$ 279,415.50
Future one time settlement payment										279,415.50
Mc Barron Settlement Agreement | Subsequent event
Subsequent events
Settlement payment										165,164.50
Future one time settlement payment										$ 165,164.50
January 2025 Securities Purchase Agreement | Subsequent event
Subsequent events
Share issue price per share | $ / shares										$ 1.00
Gross proceeds from convertible preferred stock										$ 3,100,000
February 2025 Securities Purchase Agreement | Subsequent event
Subsequent events
Percentage of outstanding common stock				70.00%
February 2025 Securities Purchase Agreement | Subsequent event | Helena Special Opportunities 1 Ltd
Subsequent events
Aggregate offering price						$ 25,000,000
Minimum | Subsequent event
Subsequent events
Reverse stock split ratio					0.25
Maximum | Subsequent event
Subsequent events
Reverse stock split ratio					0.0625
6% Convertible Exchangeable Preferred Stock
Subsequent events
Preferred stock, dividend rate (in percent)												6.00%	6.00%
Share issue price per share | $ / shares												$ 10.00
6% Convertible Exchangeable Preferred Stock | Subsequent event
Subsequent events
Preferred stock, dividend rate (in percent)									6.00%
Series C Preferred Stock | January 2025 Securities Purchase Agreement | Subsequent event
Subsequent events
Number of shares issued (in shares) | shares										1,000,000
Series D Preferred Stock | January 2025 Securities Purchase Agreement | Subsequent event
Subsequent events
Number of shares issued (in shares) | shares										2,100,000
Common Stock | February 2025 Securities Purchase Agreement | Subsequent event
Subsequent events
Number of shares issued on conversion | shares			191,978,820
Common Stock | Private Placement | Subsequent event | David Lazar
Subsequent events
Common stock value agreed to be issued							$ 8,000,000
Common stock, par value (in dollars per share) | $ / shares							$ 0.001
Share purchase agreement increment exercise lot one value							$ 1,000,000
Share purchase agreement increment exercise lot two value							$ 2,000,000
Series C Convertible Preferred Stock | February 2025 Securities Purchase Agreement | Subsequent event
Subsequent events
Number of shares issued (in shares) | shares				1,000,000
Preferred stock, par value (in dollars per share) | $ / shares				$ 0.0001
Number of shares issued on conversion | shares			2,650,000
Series D Convertible Preferred Stock | February 2025 Securities Purchase Agreement | Subsequent event
Subsequent events
Number of shares issued (in shares) | shares				2,100,000
Preferred stock, par value (in dollars per share) | $ / shares				$ 0.0001
Number of shares converted | shares			1,745,262
Series C And D Convertible Preferred Stock | February 2025 Securities Purchase Agreement | Subsequent event
Subsequent events
Number of shares issued (in shares) | shares				1,745,262
Number of shares converted | shares			1,000,000
Series E Convertible Preferred Stock | March 2025 Securities Purchase Agreement | Subsequent event
Subsequent events
Number of shares issued (in shares) | shares	1,000,000
Share issue price per share | $ / shares	$ 1.00
Gross proceeds from convertible preferred stock	$ 1,000,000.0

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