Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 109,833	$ 123,080
Receivables from collaborative partners	75,685	40,765
Short-term investments	139,123	262,293
Prepaid expenses and other current assets	6,009	5,738
Total current assets	330,650	431,876
Property and equipment, net	1,500	1,849
Operating lease right-of-use assets	12,994	14,383
Long-term investments	7,698	35,470
Other long-term assets	256	256
Total assets	353,098	483,834
Current liabilities:
Accounts payable	2,893	4,002
Accrued expenses	33,171	39,501
Current portion of operating lease liability	2,040	1,925
Total current liabilities	38,104	45,428
Liability related to sale of future royalties	331,844	353,426
Operating lease liability, net of current portion	12,566	14,112
Stockholders’ (deficit) equity:
Preferred stock, $0.001 par value, 10,000 shares authorized and no shares, issued or outstanding at September 30, 2025 and December 31, 2024, respectively	0	0
Common stock, $0.001 par value, 500,000 shares authorized, 27,575 shares and 30,473 shares issued and outstanding at September 30, 2025 and December 31, 2024, respectively	28	30
Additional paid in capital	792,682	829,860
Accumulated other comprehensive gain	47	305
Accumulated deficit	(822,173)	(759,327)
Total stockholders’ (deficit) equity	(29,416)	70,868
Total liabilities and stockholders’ (deficit) equity	$ 353,098	$ 483,834

Advance Future Royalties, Liability, Noncurrent

No definition available.

Name:	anab_AdvanceFutureRoyaltiesLiabilityNoncurrent
Namespace Prefix:	anab_
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).