CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities:
Net loss	$ (17,203)	$ (22,646)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	443	499
Non-cash interest (income) expense	(1)	31
Stock-based compensation expense	1,833	1,791
Changes in operating assets and liabilities:
License agreement receivable	(30,000)
Prepaid and other assets	(1,782)	406
Operating lease right-of-use asset	127	108
Accounts payable	(304)	(1,358)
Accrued expenses and other liabilities	(2,495)	(3,868)
Deferred revenue	39,124
Operating lease liability	(244)	(213)
Net cash used in operating activities	(10,502)	(25,250)
Cash flows from investing activities:
Purchases of property and equipment		(170)
Net cash used in investing activities		(170)
Cash flows from financing activities:
Repayments of debt principal	(3,333)	(1,667)
Payments of finance lease	(21)	(21)
Proceeds from issuance of common stock under the Gilead stock purchase agreement, net of issuance costs	4,308
Net cash provided by (used in) financing activities	954	(1,688)
Decrease in cash, cash equivalents and restricted cash	(9,548)	(27,108)
Cash, cash equivalents and restricted cash, beginning of period	46,291	121,947
Cash, cash equivalents and restricted cash, end of period	36,743	94,839
Supplemental cash flow disclosure:
Cash paid for interest	62	209
Supplemental disclosure of non-cash activities:
Capital expenditures included in accounts payable or accrued expenses	21	310
Reconciliation to amounts within the consolidated balance sheets:
Cash and cash equivalents	33,980	93,271
Restricted cash	2,763	1,568
Cash, cash equivalents and restricted cash, end of period	$ 36,743	$ 94,839