CONDENSED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets
Cash and cash equivalents	$ 120,398	$ 31,040
Short-term investments	204,423	217,149
Prepaid expenses and other current assets	6,978	4,882
Total current assets	331,799	253,071
Long-term investments	99,086
Restricted cash	2,743	2,743
Property and equipment, net	77,551	79,326
Operating lease right-of-use assets	39,374	39,949
Other long-term assets	3,533	3,796
Total assets	554,086	378,885
Current liabilities
Accounts payable	3,764	3,665
Operating lease liabilities, current portion	5,532	6,069
Accrued and other current liabilities	11,565	13,596
Total current liabilities	20,861	23,330
Operating lease liabilities, net of current portion	80,041	82,270
Total liabilities	100,902	105,600
Commitments and contingencies (Note 7)
Stockholders’ equity
Common stock, $0.0001 par value; 200,000,000 shares authorized; 70,558,546 and 49,181,295 shares issued and outstanding at June 30, 2024 and December 31, 2023, respectively	7	5
Additional paid-in capital	943,385	708,706
Accumulated other comprehensive (loss) income	(263)	8
Accumulated deficit	(489,945)	(435,434)
Total stockholders’ equity	453,184	273,285
Total liabilities and stockholders’ equity	$ 554,086	$ 378,885