UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024
Cash Flows From Operating Activities
Net loss	$ (85,621)	$ (74,123)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	8,914	10,155
Stock-based compensation	14,064	14,384
Accretion of discount on marketable securities	(2,016)	(2,961)
Other	(308)	1,320
Changes in operating assets and liabilities:
Accounts receivable, net	(1,000)	739
Prepaid expenses and other current assets	(283)	(992)
Operating lease right-of-use assets and liabilities	(412)	(635)
Other long-term assets	249	(72)
Accounts payable	1,057	161
Accrued expenses and other liabilities	1,153	(1,055)
Deferred revenue	460	(2,359)
Net cash used in operating activities	(63,743)	(55,438)
Cash Flows From Investing Activities
Purchases of property and equipment	(1,210)	(381)
Investment in marketable securities	(134,871)	(159,483)
Proceeds from maturities of marketable securities	65,191	99,000
Proceeds from sales of property and equipment	1,183	244
Net cash used in investing activities	(69,707)	(60,620)
Cash Flows From Financing Activities
Principal payments on long-term debt	(2,619)	(2,489)
Principal payments on finance lease obligations	(77)	(578)
Proceeds from issuance of common stock, net	102,336	84,607
Proceeds from issuance of common stock through employee equity plans, net	2,467	0
Net cash provided by financing activities	102,107	81,540
Net decrease in cash, cash equivalents, and restricted cash	(31,343)	(34,518)
Cash, cash equivalents and restricted cash - Beginning of period	58,214	89,667
Cash, cash equivalents, and restricted cash - End of period	26,871	55,149
Supplemental Disclosure of Non-Cash Investing and Financing Activities
Right-of-use assets obtained in exchange for operating lease obligation	$ 0	$ 433

Increase (Decrease) Operating Lease Right-Of-Use Assets And Liabilities

No definition available.

Name:	absi_IncreaseDecreaseOperatingLeaseRightOfUseAssetsAndLiabilities
Namespace Prefix:	absi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called accretion if the security was purchased at a discount and amortization if it was purchased at premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method.