Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 119,279	$ 118,038
Inventory	30	0
Prepaid expenses and other current assets	1,600	1,411
Total current assets	120,909	119,449
Property and equipment, net	1,062	1,160
Intangible assets, net	1,054	1,220
Goodwill	2,791	2,791
Right-of-use assets	6,889	7,163
Other assets	678	677
Total assets	133,383	132,460
Current liabilities:
Accounts payable	2,370	1,673
Accrued expenses	3,984	7,027
Lease liability, current	1,406	1,355
Total current liabilities	7,760	10,055
Lease liability, less current portion	7,171	7,543
Total liabilities	14,931	17,598
Commitments and contingencies (Note 7)
Stockholders’ equity:
Preferred stock, $0.001 par value; authorized – 50,000 shares; no shares issued and outstanding	0	0
Common stock, $0.001 par value; authorized – 500,000 shares; issued and outstanding – 67,274 shares and 65,926 shares at March 31, 2025 and December 31, 2024, respectively	67	66
Additional paid-in capital	525,680	505,296
Accumulated other comprehensive income (loss)	0	0
Accumulated deficit	(407,295)	(390,500)
Total stockholders’ equity	118,452	114,862
Total liabilities and stockholders’ equity	$ 133,383	$ 132,460

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).