Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 25,563	$ 35,098
Marketable securities	210,658	167,823
Unbilled accounts receivable	537	229
Prepaid expenses and other current assets	5,441	4,369
Total current assets	242,199	207,519
Property and equipment, net	5,216	6,906
Operating lease right-of-use assets	7,176	9,063
Restricted cash	1,092	1,092
Other assets	2,011	2,105
Total assets	257,694	226,685
Current liabilities:
Accounts payable	2,757	3,638
Accrued expenses and other current liabilities	8,726	9,551
Deferred revenue, current portion	0	934
Operating lease liability, current	2,192	2,602
Total current liabilities	13,675	16,725
Operating lease liability, excluding current portion	8,629	10,821
Other liabilities, excluding current portion	197	197
Total liabilities	22,501	27,743
Commitments and contingencies (Note 13)
Stockholders’ equity:
Preferred stock, $0.001 par value; 5,000,000 shares authorized; no shares issued or outstanding	0	0
Common stock, $0.001 par value; 200,000,000 shares authorized; 61,915,367 and 52,099,211 shares issued and outstanding as of December 31, 2023 and December 31, 2022, respectively	62	52
Additional paid-in capital	744,940	612,025
Accumulated other comprehensive loss	(136)	(797)
Accumulated deficit	(509,673)	(412,338)
Total stockholders’ equity	235,193	198,942
Total liabilities and stockholders’ equity	$ 257,694	$ 226,685