Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 15,858	$ 134,546
Short-term investments	82,478	0
Prepaid expenses and other current assets	6,913	4,325
Restricted cash, current portion	37	19
Total current assets	105,286	138,890
Property and equipment, net	460	1,209
Goodwill	10,502	10,502
Restricted cash, net of current portion	210	131
Total assets	116,458	150,732
Current liabilities:
Accounts payable	137	283
Accrued expenses and other current liabilities	12,803	6,317
Derivative liability, current	0	360
Total current liabilities	12,940	6,960
Royalty obligation	2,000	2,000
Deferred tax liability, net	434	270
Derivative liability, non-current	18,000	8,120
Other long-term liabilities	35	350
Total liabilities	33,409	17,700
Mezzanine equity:
Temporary equity, values issued	0	0
Stockholders’ equity:
Common stock—$0.001 par value; 200,000,000 shares authorized at December 31, 2025 and December 31, 2024; 18,512,757 and 10,471,934 shares issued and outstanding at December 31, 2025 and December 31, 2024, respectively	18	10
Additional paid-in capital	531,485	503,285
Accumulated other comprehensive income	68	0
Accumulated deficit	(448,522)	(370,263)
Total stockholders’ equity	83,049	133,032
Total liabilities, mezzanine equity and stockholders’ equity	116,458	150,732
Series D Preferred Stock
Mezzanine equity:
Temporary equity, values issued	0	0
Series E Preferred Stock
Mezzanine equity:
Temporary equity, values issued	0	0
Series C Preferred Stock
Stockholders’ equity:
Series C Preferred Stock—$0.001 par value; 34,326 shares of Series C Preferred Stock authorized at December 31, 2025 and December 31, 2024, 18,792 and 24,896 shares of Series C Preferred Stock issued and outstanding at December 31, 2025 and December 31, 2024, respectively	$ 0	$ 0

Property, Plant And Equipment And Operating Lease Right-Of-Use Asset, After Accumulated Depreciation And Amortization

No definition available.

Name:	avtx_PropertyPlantAndEquipmentAndOperatingLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
Namespace Prefix:	avtx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).