CONDENSED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Current assets
Cash and cash equivalents	$ 56,960	$ 31,040
Short-term investments	226,095	217,149
Prepaid expenses and other current assets	7,095	4,882
Total current assets	290,150	253,071
Long-term investments	119,467
Restricted cash	2,743	2,743
Property and equipment, net	76,231	79,326
Operating lease right-of-use assets	38,804	39,949
Other long-term assets	4,639	3,796
Total assets	532,034	378,885
Current liabilities
Accounts payable	1,937	3,665
Operating lease liabilities, current portion	6,756	6,069
Accrued and other current liabilities	13,775	13,596
Total current liabilities	22,468	23,330
Operating lease liabilities, net of current portion	78,693	82,270
Total liabilities	101,161	105,600
Commitments and contingencies (Note 7)
Stockholders’ equity
Common stock	7	5
Additional paid-in capital	947,441	708,706
Accumulated other comprehensive income	1,714	8
Accumulated deficit	(518,289)	(435,434)
Total stockholders’ equity	430,873	273,285
Total liabilities and stockholders’ equity	$ 532,034	$ 378,885