Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 128,732	$ 128,885
Short-term marketable securities	157,856	151,827
Accounts receivable	0	30,000
Prepaid expenses and other current assets	10,499	8,507
Total current assets	297,087	319,219
Property and equipment, net	4,266	3,985
Operating lease right-of-use assets	9,130	10,475
Other assets, noncurrent	517	661
Total assets	311,000	334,340
Current liabilities:
Accounts payable	16,918	13,951
Accrued expenses	33,468	43,184
Deferred revenue	20,500	30,610
Operating lease liabilities	3,025	2,798
Other current liabilities	1,009	990
Total current liabilities	74,920	91,533
Operating lease liabilities, noncurrent	6,927	8,575
Long-term debt, net	25,080	24,929
Deferred revenue, noncurrent	114,197	117,043
Other liabilities, noncurrent	76	203
Total liabilities	221,200	242,283
Commitments (Note 11)
Stockholders' equity:
Preferred stock, $0.0001 par value; 25,000,000 shares authorized; 0 shares issued and outstanding at June 30, 2023 and December 31, 2022, respectively	0	0
Common stock, $0.0001 par value; 350,000,000 shares authorized; 120,459,232 and 105,144,864 shares issued and outstanding at June 30, 2023 and December 31, 2022, respectively	12	11
Additional paid-in capital	854,998	746,889
Accumulated other comprehensive income (loss)	(49)	(152)
Accumulated deficit	(765,161)	(654,691)
Total stockholders’ equity	89,800	92,057
Total liabilities and stockholders’ equity	$ 311,000	$ 334,340