Fair Value Measurements - Contingent Consideration and Contingent Founder Shares (Details) $ / shares in Units, $ in Thousands		3 Months Ended
	Apr. 27, 2023 $ / shares shares	Mar. 31, 2026 USD ($) $ / shares	Jun. 30, 2025 shares	Mar. 31, 2025 USD ($)	Dec. 31, 2025 USD ($) $ / shares	Feb. 28, 2025 $ / shares
Class of Stock [Line Items]
Threshold increase in Episodic Migraine Contingent Consideration Shares	152,998
Number of Chronic Migraine Contingent Consideration Shares by increase in Episodic Migraine Contingent Consideration Shares	0
Number of Contingent Consideration Shares to be issued upon Threshold Increase in Episodic Migraine Contingent Consideration Shares	0
Reduction in number of Chronic Migraine Contingent Consideration Shares	13,996
Minimum number of Chronic Migraine Contingent Consideration Shares after Reduction	0
Income related to the change in fair value of contingent consideration | $		$ (4)		$ (3,488)
Contingent consideration liability | $		$ 38			$ 42
Common stock, par value | $ / shares		$ 0.0001			$ 0.0001	$ 0.0001
Maximum
Class of Stock [Line Items]
Number of additional shares to be issued	222,653
Reduction in Episodic Migraine Contingent Consideration Shares	13,996
Founder Shares
Class of Stock [Line Items]
Percentage of shares unvested and subject to the restrictions and forfeiture provisions	50.00%
Number of founder shares subject to vesting and forfeiture conditions	47,921
Number of founder shares forfeited			13,980
Percentage of shares not subject to restrictions and forfeiture provisions	50.00%
Number of common stock issued on conversion	95,842
Founder Shares | Priveterra
Class of Stock [Line Items]
Common stock, par value | $ / shares	$ 0.0001
Share Conversion Ratio	1
Migraine Phase 3 Contingent Founder Shares
Class of Stock [Line Items]
Number of founder shares subject to vesting and forfeiture conditions	20,141
Migraine Phase 3 Contingent Founder Shares | Upon the achievement of the conditions for the issuance of the CD BLA Contingent Consideration Shares on or prior to the CD BLA Outside Date
Class of Stock [Line Items]
Number of founder shares subject to vesting and forfeiture conditions	13,890
CD BLA Contingent Founder Shares
Class of Stock [Line Items]
Number of additional shares to be issued	55,659
Number of founder shares subject to vesting and forfeiture conditions	55,659
Episodic/Chronic Migraine Contingent Founder Shares
Class of Stock [Line Items]
Number of additional shares to be issued	152,998
Number of common shares become due and payable	27,992
Episodic/Chronic Migraine Contingent Founder Shares | Maximum
Class of Stock [Line Items]
Reduction in Episodic Migraine Contingent Consideration Shares	27,992
Episodic Migraine Contingent Consideration Shares
Class of Stock [Line Items]
Number of additional shares to be issued	55,659
Chronic Migraine Contingent Consideration Shares
Class of Stock [Line Items]
Number of additional shares to be issued	97,339
Old AEON Common Stock
Class of Stock [Line Items]
Maximum contingent consideration shares issuable	222,653