CONDENSED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents	$ 131,646	$ 60,816
Short-term investments, available-for-sale	281,305	177,272
Prepaid expenses and other current assets	4,428	7,692
Total current assets	417,379	245,780
Restricted cash	2,098	2,098
Property and equipment, net	16,939	12,856
Operating lease right-of-use assets	66,030	11,678
Other long-term assets	1,195	1,491
Total assets	503,641	273,903
Current liabilities
Accounts payable	2,968	1,112
Operating lease liabilities, current portion	3,071	2,484
Accrued and other current liabilities	7,145	9,347
Total current liabilities	13,184	12,943
Operating lease liabilities, net of current portion	69,408	9,975
Other long-term liabilities	8	18
Total liabilities	82,600	22,936
Commitments and contingencies (Note 7)
Stockholders’ equity
Common stock	5	3
Additional paid-in capital	678,973	455,210
Accumulated other comprehensive loss	(931)	(150)
Accumulated deficit	(257,006)	(204,096)
Total stockholders’ equity	421,041	250,967
Total liabilities and stockholders’ equity	$ 503,641	$ 273,903