CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 95,627	$ 106,092
Short-term investments	117,691	127,703
Interest receivable	234	157
Prepaid expenses and other current assets	5,892	7,100
Prepaid expenses to related party	575	2,000
Total current assets	220,019	243,052
Restricted cash	852	852
Other assets	1,425	612
Property and equipment, net	673	930
Operating lease right-of-use assets	25,343	31,633
Total assets	248,312	277,079
Current liabilities:
Accounts payable	3,925	3,004
Accrued expenses	15,924	13,985
Income tax payable	0	128
Operating lease liability, current	12,976	7,165
Total current liabilities	33,066	24,338
Operating lease liability, long term	19,912	28,222
Total liabilities	52,978	52,560
Stockholders’ equity:
Preferred stock, $0.0001 par value: 10,000,000 shares authorized at September 30, 2023 and December 31, 2022, respectively; 0 shares issued and outstanding at September 30, 2023 and December 31, 2022, respectively
Common stock, $0.0001 par value: 300,000,000 and 150,000,000 shares authorized at September 30, 2023 and December 31, 2022, respectively; 113,972,541 and 93,268,069 shares issued at September 30, 2023 and December 31, 2022, respectively; and 113,966,594 and 93,093,243 shares outstanding at September 30, 2023 and December 31, 2022, respectively	11	9
Additional paid-in capital	792,020	690,753
Accumulated other comprehensive loss	(200)	(468)
Accumulated deficit	(596,497)	(465,775)
Total stockholders’ equity	195,334	224,519
Total liabilities and stockholders’ equity	248,312	277,079
Related Party
Current liabilities:
Amount due to related party	$ 241	$ 56