Note 4 - Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Compensation costs	$ 174	$ 560
Customer deposits	105	77
Professional fees	83	86
Taxes and regulatory fees	328	201
Accrued rent	170	170
Accrued dividends on Series F Preferred Stock	19	29
Other accrued expenses and liabilities	4	8
Accrued expenses and other liabilities	$ 883	$ 1,131