Fair Value Measurements - New Money PIPE Subscription Agreements and Letter Agreements, Warrants (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended		2 Months Ended	3 Months Ended	7 Months Ended	9 Months Ended	12 Months Ended
	Mar. 29, 2024	Jul. 21, 2023	Feb. 28, 2021	Sep. 30, 2023	Sep. 30, 2024	Jul. 21, 2023	Sep. 30, 2024	Dec. 31, 2023
Fair Value Measurements
Proceeds from Issuance of Common Stock							$ 50
Embedded forward purchase agreements and derivative liabilities					$ 264		264	$ 41,043
Income (loss) on embedded forward purchase agreements and derivative liabilities, net		$ (11,789)		$ (15,776)	$ 81	$ (11,789)	$ (19,931)
Redemption price per warrant	$ 0.10
Issuance of shares related to cashless warrant exercises (in shares)					0		1,962,638
Warrants exercised							(10,283,637)
Warrants liability at fair value					$ 1,844		$ 1,844	1,447
Change in fair value of warrants				(1,593)	377		15,376
Additional paid in capital					$ 0		$ 15,000
Successor
Fair Value Measurements
Warrants exercised					0		10,283,637
Priveterra
Fair Value Measurements
Number of warrants issued			14,479,999
Warrants liability at fair value					$ 1,800		$ 1,800	1,400
Change in fair value of warrants				(1,600)	400		$ 400	15,400
Public warrants
Fair Value Measurements
Exercise price per warrant	$ 11.50
Warrants exercised							(8,992,590)
Payments for Cancellation of Warrant							$ 21
Public warrants | Priveterra
Fair Value Measurements
Number of warrants issued			9,200,000
Private placement warrants | Priveterra
Fair Value Measurements
Number of warrants issued			5,279,999
Letter Agreement | Sponsor
Fair Value Measurements
Embedded forward purchase agreements and derivative liabilities					300		300	$ 700
Income (loss) on embedded forward purchase agreements and derivative liabilities, net				$ (300)	$ 100		$ 400