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	$ (13,748)	$ (7,089)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation expense	22	14
Stock-based compensation expense	2,035	533
Accretion of discount on short-term investments	(518)	(358)
Amortization of right-of-use operating lease assets	85	67
Changes in operating assets and liabilities:
Receivable from related party	(141)	789
Unbilled receivable from related party	(257)	377
Prepaid expenses and other current assets	241	116
Other assets	343	5
Accounts payable, accrued expenses and operating lease liabilities	(2,986)	(4,729)
Deferred revenue - related party	(17)	(9)
Net cash used in operating activities	(14,941)	(10,284)
Cash flows from investing activities:
Capital expenditures	(32)	(14)
Purchases of short-term investments	(20,475)	(3,855)
Proceeds from maturities of short-term investments	15,000	22,000
Net cash (used in)/provided by investing activities	(5,507)	18,131
Cash flows from financing activities:
Proceeds from exercise of stock options	271	0
Proceeds from the private placement	229,998	0
Payment of issuance costs in connection with the private placement	(12,422)	0
Proceeds from issuance of promissory notes payable to related party	0	377
Repayment of promissory notes payable to related party	0	(377)
Net cash provided by financing activities	217,847	0
Increase in cash, cash equivalents and restricted cash	197,399	7,847
Cash, cash equivalents and restricted cash, beginning of period	132,391	15,425
Cash, cash equivalents and restricted cash, end of period	329,790	23,272
Supplemental Disclosure
Cash and cash equivalents	329,724	23,212
Restricted cash	66	60
Total cash, cash equivalents and restricted cash	329,790	23,272
Cash paid for interest	0	0
Cash paid for taxes	0	0
Issuance costs in connection with the private placement included in accounts payable	30	0
Issuance costs in connection with the private placement included in accrued expenses	$ 2,213	$ 0