CONDENSED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents	$ 39,654	$ 60,816
Short-term investments, available-for-sale	352,702	177,272
Prepaid expenses and other current assets	8,562	7,692
Total current assets	400,918	245,780
Restricted cash	2,743	2,098
Property and equipment, net	30,248	12,856
Operating lease right-of-use assets	67,971	11,678
Other long-term assets	1,919	1,491
Total assets	503,799	273,903
Current liabilities
Accounts payable	9,494	1,112
Operating lease liabilities, current portion	5,362	2,484
Accrued and other current liabilities	11,569	9,347
Total current liabilities	26,425	12,943
Operating lease liabilities, net of current portion	78,105	9,975
Other long-term liabilities	5	18
Total liabilities	104,535	22,936
Commitments and contingencies (Note 7)
Stockholders’ equity
Common stock	5	3
Additional paid-in capital	685,931	455,210
Accumulated other comprehensive loss	(1,321)	(150)
Accumulated deficit	(285,351)	(204,096)
Total stockholders’ equity	399,264	250,967
Total liabilities and stockholders’ equity	$ 503,799	$ 273,903