Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 33,966	$ 35,098
Marketable securities	244,198	167,823
Unbilled accounts receivable	656	229
Prepaid expenses and other current assets	4,127	4,369
Total current assets	282,947	207,519
Property and equipment, net	6,161	6,906
Operating lease right-of-use assets	8,137	9,063
Restricted cash	1,092	1,092
Other assets	1,995	2,105
Total assets	300,332	226,685
Current liabilities:
Accounts payable	3,909	3,638
Accrued expenses and other current liabilities	7,875	9,551
Deferred revenue, current portion	513	934
Operating Lease Liability, current	2,507	2,602
Total current liabilities	14,804	16,725
Operating lease liability, excluding current portion	9,653	10,821
Other liabilities, excluding current portion	447	197
Total liabilities	24,904	27,743
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; 61,822,554 and 52,099,211 shares issued and outstanding as of June 30, 2023 and December 31, 2022, respectively	62	52
Treasury stock, at cost; no shares	0	0
Additional paid-in capital	737,466	612,025
Accumulated other comprehensive loss	(1,200)	(797)
Accumulated deficit	(460,900)	(412,338)
Total stockholders’ equity	275,428	198,942
Total liabilities and stockholders’ equity	$ 300,332	$ 226,685