CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 88,515	$ 155,579
Short-term investments	285,343	268,971
Prepaid expenses and other current assets	8,616	6,521
Unbilled revenue - related party	128	102
Total current assets	382,602	431,173
Property and equipment, net	1,590	1,326
Operating lease right-of-use asset	1,468	1,610
Other assets	982	982
Total assets	386,642	435,091
Current liabilities:
Accounts payable	7,872	14,234
Accrued liabilities (related party $1,146 and $3,244 as of March 31, 2023 and December 31, 2022, respectively)	21,428	18,827
Current portion of deferred revenue - related party	288	288
Total current liabilities	29,588	33,349
Long-term debt, net	4,677	4,645
Deferred revenue - related party	789	861
Other liabilities	1,039	1,172
Total liabilities	36,093	40,027
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.01 par value; 200,000,000 shares authorized; 43,055,318 and 41,305,947 shares issued and outstanding as of March 31, 2023 and December 31, 2022, respectively	431	414
Additional paid-in capital	771,705	741,067
Accumulated other comprehensive loss	(174)	(390)
Accumulated deficit	(556,325)	(488,174)
Total stockholders’ equity	350,549	395,064
Total liabilities and stockholders’ equity	386,642	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