Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 32,971	$ 62,424
Short-term investments	299,734	367,305
Lease incentive receivables	7,358	0
Prepaid expenses and other current assets	7,764	4,709
Total current assets	347,827	434,438
Operating lease right-of-use assets	100,174	19,376
Property and equipment, net	37,158	27,725
Restricted cash	5,284	999
Deposit and other long-term assets	138	29
Total assets	490,581	482,567
Current liabilities:
Accounts payable	2,517	2,810
Accrued expenses and other current liabilities	18,585	13,588
Lease liability, current portion	4,224	4,473
Total current liabilities	25,326	20,871
Lease liability, net of current portion	118,141	26,235
Other non-current liabilities	1,114	1,114
Total liabilities	144,581	48,220
Stockholders’ equity:
Preferred stock	0	0
Common stock	10	10
Additional paid-in capital	960,180	937,134
Accumulated other comprehensive loss	(523)	(261)
Accumulated deficit	(613,667)	(502,536)
Total stockholders’ equity	346,000	434,347
Total liabilities and stockholders' equity	$ 490,581	$ 482,567

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).