Note 8 - Capitalized Development Cost and Other Long-term Assets (Details Textual) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Sep. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|---|
| Capitalized Development Cost | $ 0 | $ 4,775 | |
| Microgrid Projects With Hover Energy [Member] | |||
| Capitalized Development Cost | $ 5,150 | ||
| Microgrid Projects With Hover Energy in the US [Member] | |||
| Capitalized Development Cost | 1,200 | ||
| Italian Projects [Member] | |||
| Capitalized Development Cost | $ 3,600 |