Segment and Customer Reporting (Details 1) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Segment and Customer Reporting | ||||
| Sale of batteries and battery systems | $ 17,588 | $ 17,053 | $ 51,138 | $ 42,514 |
| Sale of services | 19 | 7 | 72 | 533 |
| Others | 108 | 73 | 108 | 273 |
| Total of Revenue with customers | $ 17,715 | $ 17,133 | $ 51,318 | $ 43,320 |