Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Jun. 30, 2026	Dec. 31, 2025
Current assets:
Cash and cash equivalents	$ 7,262,000	$ 8,878,000
Prepaid expenses and other current assets	1,461,000	808,000
Total current assets	8,723,000	9,686,000
Intangible assets	11,148,000	11,148,000
Other non-current assets	900,000	900,000
Operating lease right-of-use asset	254,000	314,000
Furniture and equipment, net	62,000	78,000
Total assets	21,087,000	22,126,000
Liabilities, Current [Abstract]
Accounts payable	4,337,000	3,508,000
Accrued expenses and other current liabilities	4,976,000	3,346,000
Total current liabilities	9,313,000	6,854,000
Operating lease liability - long-term, net of current portion	147,000	222,000
Warrant liability	40,000	44,000
Total liabilities	9,500,000	7,120,000
Commitments and contingencies (Note 7)
Stockholders' equity
Preferred stock, $0.001 par value; 5,000,000 shares authorized, no shares issued or outstanding	0	0
Common stock, $0.001 par value; 500,000,000 shares authorized; 7,100,000 and 3,199,228 shares issued and outstanding at June 30, 2026 and December 31, 2025, respectively	7,000	3,000
Additional paid-in capital	238,128,000	220,997,000
Accumulated other comprehensive income (loss)	(64,000)	10,000
Accumulated deficit	(226,484,000)	(206,004,000)
Total stockholders’ equity	11,587,000	15,006,000
Total liabilities and stockholders’ equity	$ 21,087,000	$ 22,126,000

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).