CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 45,317	$ 47,478
Marketable securities	96,262	111,384
Prepaid expenses and other current assets	6,781	2,920
Total current assets	148,360	161,782
Property and equipment, net	2,239	2,448
Operating lease right-of-use assets	4,772	5,228
Other assets	447	3,871
Total assets	155,818	173,329
Current liabilities:
Accounts payable	6,771	5,176
Accrued expenses	11,807	14,103
Operating lease liabilities, current	2,508	2,448
Other current liabilities	82	109
Total current liabilities	21,168	21,836
Operating lease liabilities, non-current	3,815	4,458
Total liabilities	24,983	26,294
Commitments and contingencies
Stockholders' equity:
Preferred stock
Common stock	3	3
Additional paid-in capital	646,045	631,611
Accumulated other comprehensive gain (loss)	(10)	103
Accumulated deficit	(515,203)	(484,682)
Total stockholders' equity	130,835	147,035
Total liabilities and stockholders' equity	$ 155,818	$ 173,329