CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 17,983	$ 40,405	$ 49,761
Marketable securities	16,462	40,081	118,509
Prepaid expenses and other current assets	11,914	1,030	4,578
Total current assets	46,359	81,516	172,848
Property and equipment, net	1,201	1,911	3,322
Right-of-use assets	2,878	4,149	6,539
Restricted cash	1,004	1,004	1,004
Total assets	51,442	88,580	183,713
Current liabilities:
Accounts payable	365	12	1,818
Accrued expenses and other current liabilities	17,853	12,291	11,278
Operating lease liabilities, current portion	1,974	3,048	2,966
Financing lease liabilities	4	11	24
Total current liabilities	20,196	15,362	16,086
Operating lease liabilities, net of current portion	928	1,224	3,824
Other non-current liabilities	1	3	206
Total liabilities	21,125	16,589	20,116
Commitments and contingencies (Note 10)
Redeemable convertible preferred stock	330,028	338,028	338,028
Stockholders' deficit:
Common stock	2	1	1
Additional paid-in-capital	41,722	29,874	20,923
Accumulated other comprehensive income (loss)	(3)	23	(27)
Accumulated deficit	(341,432)	(295,935)	(195,328)
Total stockholders' deficit	(299,711)	(266,037)	(174,431)
Total liabilities, redeemable convertible preferred stock and stockholders' deficit	$ 51,442	$ 88,580	$ 183,713

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).