| Schedule of finite lived intangible assets |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | June 30, 2026 | | December 31, 2025 | | | Gross | | | | | | | | Gross | | | | | | | | Carrying | | Accumulated | | | | | Carrying | | Accumulated | | | | | | Amount | | Amortization | | Net | | Amount | | Amortization | | Net | Amortized intangible assets - Acquired patents | | $ | 3,212 | | $ | (1,725) | | $ | 1,487 | | $ | 3,212 | | $ | (1,623) | | $ | 1,589 | | | $ | 3,212 | | $ | (1,725) | | $ | 1,487 | | $ | 3,212 | | $ | (1,623) | | $ | 1,589 |
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| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 2025 | | 2024 | | | Gross | | | | | | Gross | | | | | | | Carrying | | Accumulated | | | | Carrying | | Accumulated | | | | | Amount | | Amortization | | Net | | Amount | | Amortization | | Net | Amortized intangible assets – Acquired patents | | $ | 3,212 | | $ | (1,623) | | $ | 1,589 | | $ | 3,212 | | $ | (1,420) | | $ | 1,792 | | | $ | 3,212 | | $ | (1,623) | | $ | 1,589 | | $ | 3,212 | | $ | (1,420) | | $ | 1,792 |
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| Schedule of estimated amortization expense |
| | | | | | | | Years ending | | Amount | Remainder of 2026 | | $ | 101 | 2027 | | | 203 | 2028 | | | 194 | 2029 | | | 165 | 2030 | | | 165 | Thereafter | | | 659 | Total | | $ | 1,487 |
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Estimated amortization expense as of December 31, 2025 is as follows: | | | | | | | | Years ending | | Amount | 2026 | | $ | 203 | 2027 | | | 203 | 2028 | | | 194 | 2029 | | | 165 | 2030 | | | 165 | Thereafter | | | 659 | Total | | $ | 1,589 |
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| Schedule of goodwill |
| | | | | | | | Reporting Unit | | Goodwill | Tool Manufacturing & Related Services | | $ | 900 | Coating Services | | | 2,224 | Battery Manufacturing | | | — | Total | | $ | 3,124 |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Tool Manufacturing & | | | | | | | | | | | | Related Services | | Coating Services | | Battery Manufacturing | | Total | Balance as of January 1, 2026 | | $ | 900 | | $ | 2,224 | | $ | — | | $ | 3,124 | Impairment | | | — | | | — | | | — | | | — | Balance as of June 30, 2026 | | $ | 900 | | $ | 2,224 | | $ | — | | $ | 3,124 |
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| | | | | | | | Reporting Unit | | Goodwill | Tool Manufacturing & Related Services | | $ | 900 | Coating Services | | | 2,224 | Battery Manufacturing | | | — | Total | | $ | 3,124 |
| | | | Reporting Unit | | Goodwill | Tool Manufacturing & Related Services | | $ | 900 | Coating Services | | | 2,224 | Battery Manufacturing | | | — | Total | | $ | 3,124 |
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