Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 35,098	$ 35,412
Marketable securities	167,823	182,750
Accounts receivable	0	2,500
Unbilled accounts receivable	229	1,137
Prepaid expenses and other current assets	4,369	4,199
Total current assets	207,519	225,998
Property and equipment, net	6,906	7,368
Operating lease right-of-use assets	9,063	0
Restricted cash	1,092	1,092
Other assets	2,105	542
Total assets	226,685	235,000
Current liabilities:
Accounts payable	3,638	4,788
Accrued expenses and other current liabilities	9,551	9,231
Deferred lease incentive, current portion	0	469
Operating lease liability, current	2,602	0
Deferred revenue, current portion	934	4,711
Total current liabilities	16,725	19,199
Other liabilities, excluding current portion	197	0
Operating lease liability, excluding current portion	10,821	0
Deferred rent, excluding current portion	0	1,680
Deferred lease incentive, excluding current portion	0	2,582
Total liabilities	27,743	23,461
Commitments and contingencies (Note 12)
Stockholders’ equity:
Preferred stock, $0.001 par value; 5,000,000 shares authorized; no shares issued or outstanding
Common stock, $0.001 par value; 200,000,000 shares authorized; 52,099,211 and 40,636,398 shares issued as of December 31, 2022 and December 31, 2021, respectively; 52,099,211 and 40,626,224 shares outstanding as of December 31, 2022 and December 31, 2021, respectively	52	41
Treasury stock, at cost; no shares	0	0
Additional paid-in capital	612,025	514,362
Accumulated other comprehensive loss	(797)	(397)
Accumulated deficit	(412,338)	(302,467)
Total stockholders’ equity	198,942	211,539
Total liabilities and stockholders’ equity	$ 226,685	$ 235,000