CONDENSED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Current assets
Cash and cash equivalents	$ 48,354	$ 39,634
Short-term investments	108,254	236,645
Prepaid expenses and other current assets	5,941	6,233
Total current assets	162,549	282,512
Long-term investments	56,675	16,107
Restricted cash	2,743	2,743
Property and equipment, net	54,595	66,721
Operating lease right-of-use assets	30,500	34,429
Other long-term assets	1,399	1,697
Total assets	308,461	404,209
Current liabilities
Accounts payable	6,833	2,089
Operating lease liabilities, current portion	7,484	6,889
Accrued and other current liabilities	13,755	13,288
Total current liabilities	28,072	22,266
Operating lease liabilities, net of current portion	64,553	69,531
Other long-term liabilities	87	87
Total liabilities	92,712	91,884
Commitments and contingencies (Note 7)
Stockholders’ equity
Common stock	7	7
Additional paid-in capital	966,572	960,219
Accumulated other comprehensive (loss) income	(996)	407
Accumulated deficit	(749,834)	(648,308)
Total stockholders’ equity	215,749	312,325
Total liabilities and stockholders’ equity	$ 308,461	$ 404,209