Mezzanine Equity and Stockholders' Equity (Deficit) - Convertible Preferred Stock (Details)			7 Months Ended	12 Months Ended
	Jul. 31, 2024 shares	Jun. 25, 2024 shares	Jul. 30, 2024 USD ($) shares	Dec. 31, 2023 USD ($) item $ / shares shares	Dec. 31, 2024 $ / shares	Dec. 31, 2022 USD ($) shares
Mezzanine Equity and Stockholders' Equity (Deficit)
Exchange preferred stock for pre-funded warrants (shares)			(207,902,000)
Number of Shares Authorized			4,939,946	4,939,946
Shares Issued			4,732,044	4,939,946		4,939,946
Conversion of preferred stock				4,939,946
Carrying Value | $			$ 86,783,000	$ 91,469,000		$ 91,469,000
Number of Common Stock Equivalent Shares				4,939,946
Liquidation Preference | $				$ 91,637,000
Convertible preferred stock	4,732,044
Convertible preferred stock issued	4,732,044
Preferred stock conversion ratio	1
Preferred stock transactions | item				0
Legacy Adagio
Mezzanine Equity and Stockholders' Equity (Deficit)
Conversion of Legacy shares to the Company's shares	789,337
Number of the Company's Common Stock issued	6,771,769
Series A Preferred Stock Class
Mezzanine Equity and Stockholders' Equity (Deficit)
Number of Shares Authorized				270,856
Conversion of preferred stock				270,856
Carrying Value | $				$ 2,500,000
Conversion Price Per Share | $ / shares				$ 9.23	$ 9.23
Number of Common Stock Equivalent Shares				270,856
Liquidation Preference | $				$ 2,500,000
Series B Preferred Stock Class
Mezzanine Equity and Stockholders' Equity (Deficit)
Number of Shares Authorized				815,730
Conversion of preferred stock				815,730
Carrying Value | $				$ 10,626,000
Conversion Price Per Share | $ / shares				$ 13.04	13.04
Number of Common Stock Equivalent Shares				815,730
Liquidation Preference | $				$ 10,637,000
Series C Preferred Stock Class
Mezzanine Equity and Stockholders' Equity (Deficit)
Number of Shares Authorized				981,596
Conversion of preferred stock				981,596
Carrying Value | $				$ 15,988,000
Conversion Price Per Share | $ / shares				$ 16.3	16.3
Number of Common Stock Equivalent Shares				981,596
Liquidation Preference | $				$ 16,000,000
Series D Preferred Stock Class
Mezzanine Equity and Stockholders' Equity (Deficit)
Number of Shares Authorized				992,064
Conversion of preferred stock				992,064
Carrying Value | $				$ 19,990,000
Conversion Price Per Share | $ / shares				$ 20.16	20.16
Number of Common Stock Equivalent Shares				992,064
Liquidation Preference | $				$ 20,000,000
Series E Preferred Stock Class
Mezzanine Equity and Stockholders' Equity (Deficit)
Number of preferred stocks extinguished		207,902
Number of Shares Authorized				1,879,700
Conversion of preferred stock				1,879,700
Carrying Value | $				$ 42,365,000
Conversion Price Per Share | $ / shares				$ 22.61	$ 22.61
Number of Common Stock Equivalent Shares				1,879,700
Liquidation Preference | $				$ 42,500,000
Series E Preferred Stock Class | Pre-funded Warrants
Mezzanine Equity and Stockholders' Equity (Deficit)
Exchange preferred stock for pre-funded warrants (shares)		207,902