Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities
Net income (loss)	$ 201,370	$ (271)
Income from discontinued operations	(201,806)
Loss from continuing operations	(436)	(271)
Adjustments to reconcile net loss to net cash used in operating activities
Gain on sale of in-process research and development		(139)
Accretion of interest income	(64)
Stock-based compensation expense	48	17
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	100	162
Accounts payable, accrued expenses and other	125	(126)
Other assets	1	1
Net cash used in continuing operations for operating activities	(226)	(356)
Net cash used in discontinued operations for operating activities	(1,088)
Net cash used in operating activities	(1,314)	(356)
Cash flows from investing activities
Proceeds from milestone of a discontinued operation	225,000
Net proceeds from sale of in-process research and development		139
Proceeds from maturity of short-term investments	3,000
Net cash provided by investing activities	228,000	139
Cash flows from financing activities
Proceeds from exercise of stock options	1,485	179
Net cash provided by financing activities	1,485	179
Net increase (decrease) in cash and cash equivalents	228,171	(38)
Cash and cash equivalents, beginning of period	5,989	19,439
Cash and cash equivalents, end of period	234,160	$ 19,401
Supplemental disclosure of cash flows
Cash paid for income taxes	$ 1,088