CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 111,597	$ 155,579
Short-term investments	201,410	268,971
Prepaid expenses and other current assets	10,730	6,521
Unbilled revenue - related party	102	102
Total current assets	323,839	431,173
Property and equipment, net	1,800	1,326
Operating lease right-of-use asset	1,855	1,610
Other assets	1,263	982
Total assets	328,757	435,091
Current liabilities:
Accounts payable	3,735	14,234
Accrued liabilities and other (related party $1,110 and $1,146 as of September 30, 2023 and December 31, 2022, respectively)	19,224	18,827
Current portion of deferred revenue - related party	288	288
Total current liabilities	23,247	33,349
Long-term debt, net	20,000	4,645
Deferred revenue - related party	645	861
Other liabilities	1,289	1,172
Total liabilities	45,181	40,027
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.01 par value; 200,000,000 shares authorized; 43,700,989 and 41,305,947 shares issued and outstanding as of September 30, 2023 and December 31, 2022, respectively	437	414
Additional paid-in capital	807,339	741,067
Accumulated other comprehensive loss	(64)	(390)
Accumulated deficit	(659,048)	(488,174)
Total stockholders’ equity	283,576	395,064
Total liabilities and stockholders’ equity	328,757	435,091
Series A Preferred Stock
Stockholders’ equity:
Preferred stock	78,235	85,470
Series B Preferred Stock
Stockholders’ equity:
Preferred stock	$ 56,677	$ 56,677