CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities:
Net loss	$ (45,148)	$ (58,749)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	1,269	1,451
Non-cash interest (income) expense	(1)	141
Stock-based compensation expense	4,918	5,452
Loss on disposal of property and equipment	2	3
Changes in operating assets and liabilities:
Prepaid and other assets	1,373	(597)
Operating lease right-of-use asset	396	338
Accounts payable	(76)	(1,625)
Accrued expenses and other liabilities	(684)	(928)
Deferred revenue	34,504
Operating lease liability	(774)	(679)
Net cash provided by (used in) operating activities	(4,221)	(55,193)
Cash flows from investing activities:
Purchases of property and equipment	(30)	(486)
Net cash used in investing activities	(30)	(486)
Cash flows from financing activities:
Repayments of debt principal	(3,333)	(5,000)
Payments of finance lease	(49)	(64)
Proceeds from issuance of common stock under employee stock purchase plan	34	140
Proceeds from exercise of stock options	5	8
Net cash provided by (used in) financing activities	20,994	(4,916)
Increase (decrease) in cash, cash equivalents and restricted cash	16,743	(60,595)
Cash, cash equivalents and restricted cash, beginning of period	46,291	121,947
Cash, cash equivalents and restricted cash, end of period	63,034	61,352
Supplemental cash flow disclosure:
Cash paid for interest	62	474
Supplemental disclosure of non-cash activities:
Transfer of finance lease asset to property and equipment	85
Reconciliation to amounts within the consolidated balance sheets:
Cash and cash equivalents	61,259	59,772
Restricted cash	1,775	1,580
Cash, cash equivalents and restricted cash, end of period	63,034	$ 61,352
Gilead Stock Purchase Agreement
Cash flows from financing activities:
Proceeds from issuance of common stock and prefunded warrants in connection with the stock purchase agreement/private placement, net of issuance costs	7,605
Private Placement
Cash flows from financing activities:
Proceeds from issuance of common stock and prefunded warrants in connection with the stock purchase agreement/private placement, net of issuance costs	9,908
At-the-Market Offerings
Cash flows from financing activities:
Proceeds from issuance of common stock in connection with at-the-market offering	$ 6,824