CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 196,954	$ 106,092
Short-term investments	49,582	127,703
Interest receivable	106	157
Prepaid expenses and other current assets	4,737	7,100
Prepaid expenses to related party	1,533	2,000
Total current assets	252,912	243,052
Restricted cash	852	852
Other assets	684	612
Property and equipment, net	759	930
Operating lease right-of-use assets	27,485	31,633
Total assets	282,692	277,079
Current liabilities:
Accounts payable	5,164	3,004
Accrued expenses	16,728	13,985
Income tax payable	127	128
Operating lease liability, current	8,483	7,165
Amount due to related party	61	56
Total current liabilities	30,563	24,338
Operating lease liability, long term	23,016	28,222
Total liabilities	53,579	52,560
Stockholders’ equity:
Preferred stock, $0.0001 par value: 10,000,000 shares authorized at June 30, 2023 and December 31, 2022, respectively; 0 shares issued and outstanding at June 30, 2023 and December 31, 2022, respectively
Common stock, $0.0001 par value: 300,000,000 and 150,000,000 shares authorized at June 30, 2023 and December 31, 2022, respectively; 113,729,743 and 93,268,069 shares issued at June 30, 2023 and December 31, 2022, respectively; and 113,716,018 and 93,093,243 shares outstanding at June 30, 2023 and December 31, 2022, respectively	11	9
Additional paid-in capital	781,552	690,753
Accumulated other comprehensive loss	(225)	(468)
Accumulated deficit	(552,225)	(465,775)
Total stockholders’ equity	229,113	224,519
Total liabilities and stockholders’ equity	$ 282,692	$ 277,079