CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 44,896	$ 51,992
Marketable securities	66,373	65,948
Prepaid expenses and other current assets	2,416	3,967
Total current assets	113,685	121,907
Property and equipment, net	1,426	1,745
Operating lease right-of-use assets	15,098	16,147
Financing lease right-of-use assets	34	49
Restricted cash	927	927
Other assets	103	83
Total assets	131,273	140,858
Current liabilities:
Accounts payable	860	1,946
Contract liability	20,009
Accrued expenses and other current liabilities	8,675	8,810
Operating lease liabilities	1,002	905
Total current liabilities	30,546	11,661
Operating lease liabilities, net of current portion	12,175	12,945
Total liabilities	42,721	24,606
Commitments and contingencies (Note 12)
Stockholders' equity:
Undesignated preferred stock, $0.0001 par value, 10,000,000 shares authorized as of September 30, 2024 and December 31, 2023, respectively; 537,634 shares issued and outstanding at September 30, 2024 and 0 share issued and outstanding at December 31, 2023
Common stock, $0.0001 par value; 150,000,000 shares authorized at September 30, 2024 and December 30, 2023; 39,710,322 shares issued as of September 30, 2024 and 35,929,035 shares issued as of December 31, 2023; and 39,665,999 shares outstanding as of September 30, 2024 and 35,884,712 shares outstanding as of December 31, 2023	4	4
Additional paid-in capital	371,635	339,025
Accumulated other comprehensive income (loss)	110	(5)
Accumulated deficit	(283,197)	(222,772)
Total stockholders' equity	88,552	116,252
Total liabilities and stockholders' equity	$ 131,273	$ 140,858