CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 115,698	$ 106,092
Short-term investments	86,872	127,703
Interest receivable	244	157
Prepaid expenses and other current assets	7,461	7,100
Prepaid expenses to related party	2,000	2,000
Total current assets	212,275	243,052
Restricted cash	852	852
Other assets	490	612
Property and equipment, net	844	930
Operating lease right-of-use assets	29,583	31,633
Total assets	244,044	277,079
Current liabilities:
Accounts payable	4,134	3,004
Accrued expenses	12,289	13,985
Income tax payable	130	128
Operating lease liability, current	8,270	7,165
Amount due to related party	136	56
Total current liabilities	24,959	24,338
Operating lease liability, long term	25,553	28,222
Total liabilities	50,512	52,560
Stockholders’ equity:
Preferred stock, $0.0001 par value: 10,000,000 shares authorized at March 31, 2023 and December 31, 2022, respectively; 0 shares issued and outstanding at March 31, 2023 and December 31, 2022, respectively
Common stock, $0.0001 par value: 150,000,000 shares authorized at March 31, 2023 and December 31, 2022, respectively; 93,517,750 and 93,268,069 shares issued at March 31, 2023 and December 31, 2022, respectively; and 93,427,990 and 93,093,243 shares outstanding at March 31, 2023 and December 31, 2022, respectively	9	9
Additional paid-in capital	700,782	690,753
Accumulated other comprehensive loss	(301)	(468)
Accumulated deficit	(506,958)	(465,775)
Total stockholders’ equity	193,532	224,519
Total liabilities and stockholders’ equity	$ 244,044	$ 277,079