CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 262,567	$ 48,539
Prepaid expenses	3,606	467
Other current assets	92	100
Total current assets	266,265	49,106
Restricted cash	1,559	1,559
Property and equipment, net	5,737	4,728
Operating lease right-of-use assets	16,796	17,117
Other assets	2,582	3,398
Total assets	292,939	75,908
Current liabilities:
Accounts payable	2,406	2,361
Accrued expenses	4,395	6,260
Operating lease liability	1,155	863
Other current liabilities	675	723
Total current liabilities	8,631	10,207
Long-term liabilities:
Operating lease liabilities—non-current	17,121	17,430
Total liabilities	25,752	27,637
Redeemable convertible preferred stock		107,336
Stockholders’ equity (deficit):
Preferred stock, $0.0001 par value; 10,000,000 and 0 shares authorized as of March 31, 2021 and December 31, 2020, respectively; 0 shares issued and outstanding as of March 31, 2021 and December 31, 2020
Common stock, $0.0001 par value; 400,000,000 and 420,000,000 shares authorized as of March 31, 2021 and December 31, 2020 respectively; 37,129,729 and 893,231 shares issued and 36,770,010 and 505,074 outstanding as of March 31, 2021 and December 31, 2020, respectively	4	1
Additional paid-in capital	342,130	2,158
Accumulated deficit	(74,947)	(61,224)
Total stockholders’ equity (deficit)	267,187	(59,065)
Total liabilities, redeemable convertible preferred stock and stockholders’ equity (deficit)	$ 292,939	75,908
Series A-1 Redeemable Convertible Preferred Stock
Long-term liabilities:
Redeemable convertible preferred stock		2
Series A-2 Redeemable Convertible Preferred Stock
Long-term liabilities:
Redeemable convertible preferred stock		42,786
Series B Redeemable Convertible Preferred Stock
Long-term liabilities:
Redeemable convertible preferred stock		$ 64,548