Merger with Sesen Bio - Schedule of Net Assets Acquired in the Merger (Details) - USD ($) $ in Thousands	1 Months Ended
	Mar. 31, 2023	Mar. 07, 2023
Merger with Sesen Bio
Cash and cash equivalents		$ 37,873
Marketable securities		44,588
Prepaid expenses and other assets		1,316
Restricted cash		30
Accounts payable and accrued expenses		(3,499)
Total net assets acquired		80,308
Less: Transaction costs		(8,264)
Total net assets acquired less transaction costs		$ 72,044
Carisma Therapeutics Inc.
Merger with Sesen Bio
Severance and personnel costs paid	$ 4,600