Summary of significant accounting policies, Fixed assets (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Fixed assets [Abstract] | ||
| Depreciation expense | $ 0.7 | $ 0.9 |
| Tooling [Member] | ||
| Fixed assets [Abstract] | ||
| Estimated useful life | 5 years | |
| Machinery and Equipment [Member] | ||
| Fixed assets [Abstract] | ||
| Estimated useful life | 10 years | |
| Furniture and Office Equipment [Member] | Minimum [Member] | ||
| Fixed assets [Abstract] | ||
| Estimated useful life | 5 years | |
| Furniture and Office Equipment [Member] | Maximum [Member] | ||
| Fixed assets [Abstract] | ||
| Estimated useful life | 10 years | |
| Computer Software and Equipment [Member] | Minimum [Member] | ||
| Fixed assets [Abstract] | ||
| Estimated useful life | 3 years | |
| Computer Software and Equipment [Member] | Maximum [Member] | ||
| Fixed assets [Abstract] | ||
| Estimated useful life | 7 years | |