Stock-Based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands		5 Months Ended	7 Months Ended	12 Months Ended
	Jul. 31, 2024	Dec. 31, 2024	Jul. 30, 2024	Dec. 31, 2023
Number of shares
Beginning balance (shares)	740,409		747,001
Forfeited (shares)			(6,592)
Options issued as part of the Business Combination (shares)	7,587
Ending balance (shares)			740,409	747,001
Vested and expected to vest (shares)			0
Vested and exercisable (shares)			0
Weighted Average Exercise Price
Beginning balance (in dollars per share)	$ 6.18		$ 6.17
Forfeited (in dollars per share)			4.82
Ending balance (in dollars per share)			6.18	$ 6.17
Vested and expected to vest (in dollars per share)			0
Vested and exercisable (in dollars per share)			$ 0
Weighted Average Remaining Contractual Life (in years)
Weighted Average Remaining Contractual Life (in years)				7 years 5 months 12 days
Aggregate Intrinsic Value [Abstract]
Stock option exercises (in shares)			0
Fair value of awards vested			$ 300
Unrecognized compensation cost			400
2022 Stock Incentive Plan
Aggregate Intrinsic Value [Abstract]
Beginning balance			$ 72
Ending balance				$ 72
2024 Employee Stock Purchase Plan
Number of shares
Beginning balance (shares)		0
Options issued as part of the Business Combination (shares)		7,587
Ending balance (shares)	0	7,587
Vested and expected to vest (shares)		7,587
Vested and exercisable (shares)		7,587
Weighted Average Exercise Price
Beginning balance (in dollars per share)		$ 0
Options issued as part of the Business Combination (in dollars per share)		8.97
Ending balance (in dollars per share)	$ 0	8.97
Vested and expected to vest (in dollars per share)		8.97
Vested and exercisable (in dollars per share)		$ 8.97
Aggregate Intrinsic Value [Abstract]
Beginning balance		$ 0
Ending balance	$ 0
Adagio Medical Inc
Number of shares
Forfeited (shares)	(45,544)