CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 122,661	$ 61,084
Short-term investments	233,663	64,993
Accrued interest	450	262
Unbilled grant receivables		298
Prepaid expenses and other current assets	4,543	676
Total current assets	361,317	127,313
Property and equipment, net	812	350
Operating lease right-of-use assets	8,692	11,759
Total assets	370,821	139,422
Current liabilities:
Accounts payable	963	630
Accrued expenses	7,530	5,163
Operating lease liability, current	3,229	3,067
Amount due to related party	572	246
Total current liabilities	12,294	9,106
Operating lease liability, long term	5,463	8,692
Total liabilities	17,757	17,798
Preferred stock
Preferred stock, value		173,127
Stockholders’ equity (deficit):
Preferred stock, $0.0001 par value: 10,000,000 and 0 shares authorized at December 31, 2020 and 2019, respectively; 0 shares issued and outstanding at December 31, 2020 and 2019, respectively;
Common stock, $0.0001 par value: 150,000,000 and 90,000,000 shares authorized at December 31, 2020 and 2019, respectively; 65,106,873 and 6,502,929 shares issued at December 31, 2020 and 2019, respectively; and 61,931,255 and 2,099,740 shares outstanding at December 31, 2020 and 2019, respectively	7
Additional paid-in capital	478,272	3,748
Accumulated other comprehensive (loss) income	(112)	68
Accumulated deficit	(125,103)	(55,319)
Total stockholders’ equity (deficit)	353,064	(51,503)
Total liabilities, convertible preferred stock and stockholders’ equity (deficit)	$ 370,821	139,422
Series B Preferred Stock
Preferred stock
Preferred stock, value		120,923
Series A Preferred Stock
Preferred stock
Preferred stock, value		$ 52,204