CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 225,447	$ 122,661
Short-term investments	87,890	233,663
Accrued interest	409	450
Prepaid expenses and other current assets	2,299	4,543
Total current assets	316,045	361,317
Other assets	692
Property and equipment, net	1,215	812
Operating lease right-of-use assets	9,559	8,692
Total assets	327,511	370,821
Current liabilities:
Accounts payable	4,202	963
Accrued expenses	9,975	7,530
Operating lease liability, current	4,830	3,229
Amount due to related party	1,701	572
Total current liabilities	20,708	12,294
Operating lease liability, long term	4,334	5,463
Total liabilities	25,042	17,757
Stockholders’ equity:
Preferred stock, $0.0001 par value: 10,000,000 shares authorized at June 30, 2021 and December 31, 2020, respectively; 0 shares issued and outstanding at June 30, 2021 and December 31, 2020, respectively
Common stock, $0.0001 par value: 150,000,000 shares authorized at June 30, 2021 and December 31, 2020, respectively; 65,106,873 shares issued at June 30, 2021 and December 31, 2020, respectively; and 62,792,043 and 61,931,255 shares outstanding at June 30, 2021 and December 31, 2020, respectively	7	7
Additional paid-in capital	496,101	478,272
Accumulated other comprehensive loss	(25)	(112)
Accumulated deficit	(193,614)	(125,103)
Total stockholders’ equity	302,469	353,064
Total liabilities and stockholders’ equity	$ 327,511	$ 370,821