Note 8 - Income Taxes (Details Textual) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | $ 3,800 | $ 4,000 |
| Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | 0 | |
| Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit | 0 | |
| Domestic Tax Jurisdiction [Member] | ||
| Operating Loss Carryforwards | 87,400 | $ 8,700 |
| Operating Loss Carryforwards, Subject to Expiration | 35,900 | |
| Domestic Tax Jurisdiction [Member] | Research Tax Credit Carryforward [Member] | Internal Revenue Service (IRS) [Member] | ||
| Tax Credit Carryforward, Amount | 1,900 | |
| State and Local Jurisdiction [Member] | Research Tax Credit Carryforward [Member] | California Franchise Tax Board [Member] | ||
| Tax Credit Carryforward, Amount | $ 200 | |