Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2023
Subsequent Events [Abstract]
Subsequent Events	Subsequent EventsOn October 27, 2023, the Company closed the transaction under the asset purchase agreement (the “Purchase Agreement”) to sell its rights, title and interest in, assets relating to AVTX-801, AVTX-802 and AVTX-803 (collectively, the “800 Series”) to AUG Therapeutics, LLC (“AUG”). The Purchase Agreement was entered into in on September 11, 2023. AUG paid an upfront payment of $150,000, as well as, for each compound, make a contingent milestone payment of $15,000,000 (for a potential aggregate of $45.0 million) if the first FDA approval is for an indication other than a Rare Pediatric Disease (as defined in the Purchase Agreement), or up to 20% of certain payments, if any, granted to AUG upon any sale of any priority review voucher granted to AUG by the FDA, net of any selling costs. Additionally, AUG assumed up to $150,000 of certain liabilities incurred prior to the date of the Purchase Agreement and assume all costs relating to the 800 Series from the date of the Purchase Agreement. Avalo will evaluate the accounting impact of the transaction in the fourth quarter of 2023.