CONDENSED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Current assets
Cash and cash equivalents	$ 53,414	$ 27,873
Short-term investments	236,273	239,481
Prepaid expenses and other current assets	6,884	5,984
Total current assets	296,571	273,338
Long-term investments	41,611	110,392
Restricted cash	2,743	2,743
Property and equipment, net	70,341	74,658
Operating lease right-of-use assets	35,076	36,014
Other long-term assets	1,970	4,058
Total assets	448,312	501,203
Current liabilities
Accounts payable	1,510	638
Operating lease liabilities, current portion	6,912	6,050
Accrued and other current liabilities	10,505	12,229
Total current liabilities	18,927	18,917
Operating lease liabilities, net of current portion	71,630	74,223
Other long-term liabilities	87	87
Total liabilities	90,644	93,227
Commitments and contingencies (Note 7)
Stockholders’ equity
Common stock	7	7
Additional paid-in capital	956,483	951,519
Accumulated other comprehensive income	362	674
Accumulated deficit	(599,184)	(544,224)
Total stockholders’ equity	357,668	407,976
Total liabilities and stockholders’ equity	$ 448,312	$ 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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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).