CONDENSED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Current assets
Cash and cash equivalents	$ 24,958	$ 39,634
Short-term investments	157,806	236,645
Prepaid expenses and other current assets	5,281	6,233
Total current assets	188,045	282,512
Long-term investments	57,671	16,107
Restricted cash	2,743	2,743
Property and equipment, net	56,768	66,721
Operating lease right-of-use assets	30,942	34,429
Other long-term assets	1,476	1,697
Total assets	337,645	404,209
Current liabilities
Accounts payable	3,819	2,089
Operating lease liabilities, current portion	7,280	6,889
Accrued and other current liabilities	12,462	13,288
Total current liabilities	23,561	22,266
Operating lease liabilities, net of current portion	66,259	69,531
Other long-term liabilities	87	87
Total liabilities	89,907	91,884
Commitments and contingencies (Note 7)
Stockholders’ equity
Common stock	7	7
Additional paid-in capital	964,664	960,219
Accumulated other comprehensive (loss) income	(425)	407
Accumulated deficit	(716,508)	(648,308)
Total stockholders’ equity	247,738	312,325
Total liabilities and stockholders’ equity	$ 337,645	$ 404,209

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).

Name:	us-gaap_AccountsPayableCurrent
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).