Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 26,060	$ 60,652
Short-term investments	0	65,039
Prepaid expenses and other current assets	2,849	5,609
Total current assets	28,909	131,300
Operating lease right-of-use assets	29,031	33,611
Property and equipment, net	10,462	11,607
Restricted cash	1,976	1,976
Deposit and other long-term assets	2,023	1,347
Total assets	72,401	179,841
Current liabilities:
Accounts payable	12,459	1,610
Accrued expenses and other current liabilities	26,476	15,620
Lease liability, current portion	5,814	5,668
Total current liabilities	44,749	22,898
Lease liability, net of current portion	83,126	86,037
Other non-current liabilities	179	192
Total liabilities	128,054	109,127
Commitments and contingencies (Note 4)
Stockholders’ (deficit) equity:
Preferred stock	0	0
Common stock	2	2
Additional paid-in capital	1,155,598	1,138,070
Accumulated other comprehensive loss	(440)	(407)
Accumulated deficit	(1,210,813)	(1,066,951)
Total stockholders’ (deficit) equity	(55,653)	70,714
Total liabilities and stockholders’ (deficit) equity	$ 72,401	$ 179,841

Accrued expenses and other current liabilities.

No definition available.

Name:	advm_AccruedExpensesAndOtherCurrentLiabilities
Namespace Prefix:	advm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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).