CONDENSED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Current assets
Cash and cash equivalents	$ 60,114	$ 27,873
Short-term investments	222,217	239,481
Prepaid expenses and other current assets	6,944	5,984
Total current assets	289,275	273,338
Long-term investments	31,421	110,392
Restricted cash	2,743	2,743
Property and equipment, net	68,182	74,658
Operating lease right-of-use assets	33,795	36,014
Other long-term assets	1,820	4,058
Total assets	427,236	501,203
Current liabilities
Accounts payable	1,437	638
Operating lease liabilities, current portion	6,373	6,050
Accrued and other current liabilities	11,178	12,229
Total current liabilities	18,988	18,917
Operating lease liabilities, net of current portion	70,261	74,223
Other long-term liabilities	87	87
Total liabilities	89,336	93,227
Commitments and contingencies (Note 7)
Stockholders’ equity
Common stock	7	7
Additional paid-in capital	958,256	951,519
Accumulated other comprehensive income	536	674
Accumulated deficit	(620,899)	(544,224)
Total stockholders’ equity	337,900	407,976
Total liabilities and stockholders’ equity	$ 427,236	$ 501,203

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).