| Reconciliation of net loss under segment reporting |
| | | | | | | | | | | | | | | | Three Months Ended March 31, | | | 2026 | | 2025 | Operating expenses | | | | | | | Reimbursement from JDAs and others | | $ | 3,410 | | $ | 34 | Payroll expense | | | (5,860) | | | (8,133) | Occupancy expense | | | (859) | | | (1,497) | Professional service expense | | | (916) | | | (606) | Research and development expense | | | (933) | | | (537) | Depreciation expense | | | (882) | | | (1,984) | Other operating expense | | | (451) | | | (399) | Loss from operations | | $ | (6,491) | | $ | (13,122) | Total other income (expense), net | | | (2,084) | | | 252 | Net loss | | $ | (8,575) | | $ | (12,870) |
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| | | | | | | | | | | | | | | | Year Ended December 31, | | | 2025 | | 2024 | Operating expenses | | | | | | | Reimbursement from JDAs and others | | $ | 1,686 | | $ | 3,570 | Payroll expense | | | (26,375) | | | (35,638) | Occupancy expense | | | (6,292) | | | (7,124) | Professional service expense | | | (4,146) | | | (3,671) | Research and development expense | | | (3,646) | | | (2,990) | Depreciation expense | | | (6,067) | | | (8,302) | Loss on impairment and lease termination | | | (17,063) | | | — | Other operating expense | | | (1,685) | | | (2,365) | Loss from operations | | $ | (63,588) | | $ | (56,520) | Total other income (expense), net | | | (10,257) | | | 2,176 | Net loss | | $ | (73,845) | | $ | (54,344) |
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| Schedule of long-lived assets and capital expenditure by geographical location |
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| | | | | | | | | | | | | | | | As of December 31, 2025 | Long-Lived Asset Type | | South Korea | | United States | Leasehold improvements | | $ | — | | $ | 10,680 | Machinery and equipment | | | 10,609 | | | 5,706 | Furniture and fixtures | | | 94 | | | 325 | Computer and software | | | 86 | | | 130 | Buildings | | | 1,227 | | | — | Building Fixtures | | | 1,206 | | | — | Land | | | 3,382 | | | — | Construction in progress (advances on property and equipment) | | | — | | | 632 | Accumulated depreciation | | | (4,589) | | | (8,212) | Net property, plant and equipment | | $ | 12,015 | | $ | 9,261 | Operating lease right-of-use assets | | | — | | | 7,576 | Total Long-Lived Assets | | $ | 12,015 | | $ | 16,837 |
| | | | | | | | | | | | | | | | As of December 31, 2024 | Long-Lived Asset Type | | South Korea | | United States | Leasehold improvements | | $ | — | | $ | 32,427 | Machinery and equipment | | | 9,934 | | | 12,271 | Furniture and fixtures | | | 90 | | | 325 | Computer and software | | | 72 | | | 131 | Buildings | | | 1,205 | | | — | Building Fixtures | | | 1,143 | | | — | Land | | | 3,320 | | | — | Construction in progress (advances on property and equipment) | | | — | | | 1,627 | Accumulated depreciation | | | (2,448) | | | (12,407) | Net property, plant and equipment | | $ | 13,316 | | $ | 34,374 | Operating lease right-of-use assets | | | — | | | 8,769 | Finance lease right-of-use assets | | | — | | | 6,767 | Total Long-Lived Assets | | $ | 13,316 | | $ | 49,910 |
| | | | | | | | | | | | | | | | | | | | | | Year Ended December 31, 2025 | | | South Korea | | United States | | Total | Capital Expenditures, net | | | | | | | | | | Property and equipment expenditures | | $ | 118 | | $ | 931 | | $ | 1,049 | Advances on property and equipment | | | — | | | 45 | | | 45 | Proceeds from disposal of property and equipment from lease termination | | | — | | | (2,400) | | | (2,400) | Proceeds from disposal of property and equipment | | | — | | | (20) | | | (20) | Total Capital Expenditures, net | | $ | 118 | | $ | (1,444) | | $ | (1,326) |
| | | | | | | | | | | | | | | | | | | | | | Year Ended December 31, 2024 | | | South Korea | | United States | | Total | Capital Expenditures, net | | | | | | | | | | Property and equipment expenditures | | $ | 68 | | $ | 955 | | $ | 1,023 | Advances on property and equipment | | | — | | | 960 | | | 960 | Proceeds from disposal of property and equipment | | | — | | | (106) | | | (106) | Total Capital Expenditures, net | | $ | 68 | | $ | 1,809 | | $ | 1,877 |
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