Property, plant and equipment, net (Details) - USD ($) $ in Thousands |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Property, plant and equipment, net | ||
| Gross balance of property, plant and equipment | $ 349,986 | $ 333,116 |
| Less: Accumulated depreciation | (233,588) | (227,850) |
| Less: Impairment | (1,693) | (1,446) |
| Balance of property, plant and equipment, net | 114,705 | 103,820 |
| Machinery and equipment | ||
| Property, plant and equipment, net | ||
| Gross balance of property, plant and equipment | 249,053 | 241,471 |
| Buildings | ||
| Property, plant and equipment, net | ||
| Gross balance of property, plant and equipment | 70,367 | 66,230 |
| Electronic equipment | ||
| Property, plant and equipment, net | ||
| Gross balance of property, plant and equipment | 6,301 | 5,880 |
| Motor vehicles | ||
| Property, plant and equipment, net | ||
| Gross balance of property, plant and equipment | 4,593 | 4,752 |
| Construction in progress | ||
| Property, plant and equipment, net | ||
| Gross balance of property, plant and equipment | $ 19,672 | $ 14,783 |