Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 35,965	$ 71,308
Receivables from collaborative partners	6,851	1,419
Short-term investments	354,939	369,933
Prepaid expenses and other current assets	9,080	4,545
Total current assets	406,835	447,205
Property and equipment, net	2,098	2,089
Operating lease right-of-use assets	16,174	17,898
Long-term investments	27,026	142,935
Other long-term assets	256	256
Total assets	452,389	610,383
Current liabilities:
Accounts payable	4,698	2,784
Accrued expenses	30,967	21,633
Current portion of operating lease liability	1,777	1,637
Total current liabilities	37,442	26,054
Liability related to sale of future royalties	310,807	304,413
Operating lease liability, net of current portion	16,037	17,813
Stockholders’ equity:
Preferred stock, $0.001 par value, 10,000 shares authorized and no shares, issued or outstanding at December 31, 2023 and December 31, 2022, respectively	0	0
Common stock, $0.001 par value, 500,000 shares authorized, 26,597 shares and 28,513 shares issued and outstanding at December 31, 2023 and December 31, 2022, respectively	27	29
Additional paid in capital	702,969	717,797
Accumulated other comprehensive loss	(797)	(5,246)
Accumulated deficit	(614,096)	(450,477)
Total stockholders’ equity	88,103	262,103
Total liabilities and stockholders’ equity	$ 452,389	$ 610,383

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).