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Note 5 - Property and Equipment (Details Textual) € in Millions | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2026 USD ($) | Dec. 31, 2025 USD ($) | Dec. 31, 2024 EUR (€) | Apr. 30, 2026 USD ($) | Oct. 31, 2025 USD ($)
Property, Plant and Equipment [Line Items] |  |  |  |  |
Consideration for equipment and services pursuant to the MESA and SOWs | € |  |  | € 49.0 |  |
Other [Member] |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Depreciation expense | $ 0 | $ 0 |  |  |
Building Modifications [Member] |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Capital improvements payable |  |  |  |  | $ 34,400,000
Building Modifications [Member] | Subsequent Event [Member] |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Capital improvements payable |  |  |  | $ 34,400,000 |

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