CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cash flows from operating activities:
Net loss	$ (15,566)	$ (30,531)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	0	2
Non-cash lease cost	551	512
Share-based compensation	2,270	4,136
Changes in operating assets and liabilities:
Collaboration receivable, current and non-current - related party	24,938	21,396
Other receivables	625	(3,189)
Prepaid expenses and other current assets	616	982
Other assets	0	1
Accounts payable	(6,526)	1,318
Accrued expenses and other current liabilities	(10,997)	3,454
Deferred revenue, current and non-current	(12)	(254)
Deferred revenue - related party, current and non-current	(16,901)	(9,966)
Other long-term liabilities	0	(62)
Operating lease liability	(682)	(605)
Income taxes	(11)	0
Net cash used in operating activities	(21,695)	(12,806)
Net decrease in cash and cash equivalents:	(21,695)	(12,806)
Cash, cash equivalents and restricted cash at beginning of period	52,889	76,333
Cash, cash equivalents and restricted cash at end of period	$ 31,194	$ 63,527