CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 149,165,000	$ 100,141,000
Marketable securities	171,339,000	153,007,000
Restricted cash	54,000	54,000
Prepaid expenses and other current assets	6,641,000	2,949,000
Contingent value right asset	10,000,000	10,000,000
Total current assets	337,199,000	266,151,000
Property and equipment, net	683,000	742,000
Operating lease right-of-use assets	241,000	320,000
Deferred offering costs	563,000	563,000
Other long-term assets	4,091,000	4,091,000
Total assets	342,777,000	271,867,000
Current liabilities:
Accounts payable	2,727,000	532,000
Accrued expenses and other current liabilities	12,304,000	15,362,000
Contingent value right liability	10,000,000	10,000,000
Total current liabilities	25,031,000	25,894,000
Long-term liabilities	34,000	67,000
Total liabilities	25,065,000	25,961,000
Commitments and contingencies (Note 9):
Stockholders' equity (deficit):
Preferred stock, value	0	0
Common stock, par value $0.001; authorized shares - 100,000,000; issued and outstanding shares - 46,782,639 and 41,292,027 at March 31, 2024 and December 31, 2023, respectively	47,000	41,000
Additional paid-in capital	494,904,000	400,172,000
Accumulated other comprehensive loss	(53,000)	141,000
Accumulated deficit	(177,186,000)	(154,448,000)
Total stockholders' equity (deficit)	317,712,000	245,906,000
Total liabilities, convertible preferred stock and stockholders' equity (deficit)	$ 342,777,000	$ 271,867,000