CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 226,651	$ 77,391
Marketable securities	90,328	99,110
Accounts receivable, net	88	447
Prepaid expenses and other current assets	6,604	12,484
Total current assets	323,671	189,432
Property and equipment, net	310	961
Restricted cash equivalents	985	1,446
Operating lease right-of-use assets	5,181	1,771
Deposits and other assets	2,498	24
Total assets	332,645	193,634
Current liabilities:
Accounts payable	3,519	2,939
Accrued expenses	17,910	23,949
Operating lease liabilities, current portion	1,259	1,518
Total current liabilities	22,688	28,406
Operating lease liabilities, net of current portion	4,698	463
Total liabilities	27,386	28,869
Commitments and contingencies (Note 16)
Stockholders' equity:
Common stock, $0.0001 par value; 300,000,000 shares authorized; 109,884,502 and 68,629,738 shares issued and outstanding as of December 31, 2025 and 2024, respectively	11	7
Additional paid-in capital	1,056,271	771,542
Accumulated deficit	(751,427)	(606,692)
Accumulated other comprehensive income (loss)	404	(92)
Total stockholders' equity	305,259	164,765
Total liabilities and stockholders' equity	$ 332,645	$ 193,634

Deposits and other assets.

No definition available.

Name:	amlx_DepositsAndOtherAssets
Namespace Prefix:	amlx_
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).