Note 10 - Income Taxes (Details Textual) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Income Tax Paid, State and Local, after Refund Received | $ (69) | |
| Income Taxes Paid, Net | (69) | $ (323) |
| Deferred Tax Assets, Valuation Allowance | 31,156 | 23,165 |
| Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | 0 | $ 0 |
| Research Tax Credit Carryforward [Member] | ||
| Tax Credit Carryforward, Amount | 3,801 | |
| Domestic Tax Jurisdiction [Member] | ||
| Operating Loss Carryforwards | $ 37,407 | |
| Open Tax Year | 2022 2023 2024 2025 | |
| State and Local Jurisdiction [Member] | ||
| Operating Loss Carryforwards | $ 50,036 | |
| Open Tax Year | 2022 2023 2024 2025 | |
| Illinois Department of Revenue [Member] | ||
| Income Tax Paid, State and Local, after Refund Received | $ (71) | |
| New York City Department of Finance [Member] | ||
| Income Tax Paid, State and Local, after Refund Received | 16 | |
| New York State Division of Taxation and Finance [Member] | ||
| Income Tax Paid, State and Local, after Refund Received | $ (13) | |