Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 12,963	$ 32,397
Marketable securities	56,532	50,574
Prepaid expenses	1,804	3,621
Other current assets	830	955
Total current assets	72,129	87,547
Operating lease right-of-use assets	1,029	1,137
Finance lease right-of-use assets	181	206
Property, equipment and leasehold improvements, net	198	216
Other non-current assets	273	297
Total assets	73,810	89,403
Current liabilities:
Accounts payable	1,511	1,809
Accrued expenses	4,932	3,709
Operating lease liabilities	216	184
Finance lease liabilities	93	122
Total current liabilities	6,752	5,824
Operating lease liabilities	884	1,001
Finance lease liabilities		31
Total liabilities	7,636	6,856
Commitments and contingencies (Note 12)
Stockholders’ equity:
Preferred stock: $0.001 par value; 5,000,000 shares authorized at June 30, 2024 and December 31, 2023; no shares issued or outstanding at June 30, 2024 and December 31, 2023.
Common stock: $0.001 par value; 200,000,000 shares authorized at June 30, 2024 and December 31, 2023; and 72,591,917 and 68,283,699 shares issued and outstanding at June 30, 2024 and December 31, 2023, respectively.	73	68
Additional paid-in capital	328,573	321,642
Accumulated other comprehensive loss	(84)	(29)
Accumulated deficit	(262,388)	(239,134)
Total stockholders’ equity	66,174	82,547
Total liabilities and stockholders’ equity	$ 73,810	$ 89,403