Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 3,737	$ 4,965
Digital assets	6,613	0
Accounts receivable, net	12	186
Prepaid expenses and other current assets	528	118
Total current assets	10,890	5,269
Other assets	4	6
Total assets	10,894	5,275
Current liabilities:
Accounts payable	162	105
Accrued expenses and other current liabilities	883	1,131
Deferred revenue	25	36
Total current liabilities	1,070	1,272
Total liabilities	1,070	1,272
Commitments and contingencies (see Note 9)
Stockholders’ equity:
Preferred stock Series F, convertible; $0.0001 par value; $169,000 stated value; 5,000,000 shares authorized, 150 and 545 shares issued and outstanding as of September 30, 2025, and December 31, 2024, respectively	0	0
Common stock; $0.0001 par value; 150,000,000 shares authorized, 3,207,399 and 3,207,210 shares issued and outstanding as of September 30, 2025, respectively, and 1,144,926 and 1,144,737 shares issued and outstanding as of December 31, 2024, respectively	0	0
Treasury Stock, 189 common shares	(181)	(181)
Additional paid-in capital	245,846	236,458
Accumulated deficit	(235,841)	(232,274)
Total stockholders’ equity	9,824	4,003
Total liabilities and stockholders’ equity	$ 10,894	$ 5,275