Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Current assets:
Cash and cash equivalents	$ 35,453	$ 30,643
Marketable securities	144,426	178,263
Prepaid expenses and other current assets	1,011	913
Total current assets	180,890	209,819
Property and equipment, net	324	102
Operating lease, right-of-use ("ROU") asset	8,391	9,099
Restricted cash	568	568
Total assets	190,173	219,588
Current liabilities:
Accounts payable	2,906	1,585
Accrued expenses	11,585	11,383
Operating lease obligations, current portion	1,637	1,000
Total current liabilities	16,128	13,968
Operating lease obligations, long-term portion	7,996	8,829
Total liabilities	24,124	22,797
Commitments and Contingencies
Stockholders' equity:
Common stock, $0.0001 par value: 300,000 shares authorized; 180,088 and 178,324 shares issued and outstanding at June 30, 2026 and December 31, 2025, respectively	18	18
Additional paid-in-capital	640,925	627,665
Accumulated other comprehensive income (loss)	(251)	280
Accumulated deficit	(474,643)	(431,172)
Total stockholders' equity	166,049	196,791
Total liabilities and stockholders' equity	$ 190,173	$ 219,588

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).