| Dec 31,
2018 | Dec 31,
2019 | Dec 31,
2020 | Dec 31,
2021 | Dec 31,
2022 | Dec 31,
2023 |
|---|
| Cash and deposits | - | 286 | 791 | 1,489 | 1,562 | 1,518 |
|---|
| Accounts receivable - trade, and contract assets | - | - | - | - | 408 | 546 |
|---|
| Work in process | - | 14 | 16 | 13 | 6 | 2 |
|---|
| Raw materials | - | 1 | 1 | 1 | 1 | 1 |
|---|
| Other | - | 28 | 16 | 21 | 33 | 57 |
|---|
| Current assets | - | 619 | 1,098 | 1,823 | 2,011 | 2,123 |
|---|
| Other | - | 28 | 16 | 21 | 33 | 57 |
|---|
| Current assets | - | 619 | 1,098 | 1,823 | 2,011 | 2,123 |
|---|
| Buildings and structures | - | 47 | 48 | 47 | 47 | 48 |
|---|
| Tools, furniture and fixtures | - | 52 | 72 | 86 | 100 | 135 |
|---|
| Machinery, equipment and vehicles | - | 3 | 5 | 5 | 4 | 4 |
|---|
| Accumulated depreciation | - | -37 | -63 | -84 | -108 | -148 |
|---|
| Tools, furniture and fixtures | - | 52 | 72 | 86 | 100 | 135 |
|---|
| Property, plant and equipment | - | 95 | 88 | 86 | 76 | 73 |
|---|
| Right-of-use assets | - | 30 | 27 | 33 | 32 | 35 |
|---|
| Accumulated depreciation | - | -37 | -63 | -84 | -108 | -148 |
|---|
| Property, plant and equipment | - | 95 | 88 | 86 | 76 | 73 |
|---|
| Software | - | 9 | 9 | 9 | 7 | 5 |
|---|
| Intangible assets | - | 9 | 9 | 9 | 7 | 5 |
|---|
| Leasehold deposits | - | 69 | 57 | 27 | 28 | 27 |
|---|
| Deferred tax assets | - | 22 | 21 | 24 | 27 | 31 |
|---|
| Other | - | 4 | 3 | 2 | 3 | 3 |
|---|
| Investments and other assets | - | 96 | 81 | 54 | 58 | 61 |
|---|
| Leasehold deposits | - | 69 | 57 | 27 | 28 | 27 |
|---|
| Deferred tax assets | - | 22 | 21 | 24 | 27 | 31 |
|---|
| Other | - | 4 | 3 | 2 | 3 | 3 |
|---|
| Investments and other assets | - | 96 | 81 | 54 | 58 | 61 |
|---|
| Non-current assets | - | 199 | 178 | 150 | 141 | 139 |
|---|
| Assets | - | 818 | 1,276 | 1,973 | 2,152 | 2,263 |
|---|
| Accounts payable - trade | - | 45 | 44 | 34 | 34 | 58 |
|---|
| Current portion of long-term borrowings | - | 63 | 104 | 94 | 135 | 64 |
|---|
| Lease liabilities | - | 5 | 6 | 7 | 8 | 3 |
|---|
| Accounts payable - other | - | 121 | 93 | 123 | 129 | 162 |
|---|
| Accounts payable - other | - | 121 | 93 | 123 | 129 | 162 |
|---|
| Accrued expenses | - | 46 | 51 | 53 | 49 | 60 |
|---|
| Accrued expenses | - | 46 | 51 | 53 | 49 | 60 |
|---|
| Income taxes payable | - | 3 | 24 | 95 | 98 | 59 |
|---|
| Income taxes payable | - | 3 | 24 | 95 | 98 | 59 |
|---|
| Provision for bonuses | - | 26 | 35 | 39 | 45 | 54 |
|---|
| Provision for loss on orders received | - | 2 | 2 | - | - | 4 |
|---|
| Provision for bonuses | - | 26 | 35 | 39 | 45 | 54 |
|---|
| Other | - | 65 | 109 | 115 | 127 | 136 |
|---|
| Current liabilities | - | 453 | 467 | 562 | 625 | 599 |
|---|
| Long-term borrowings | - | 182 | 570 | 459 | 323 | 260 |
|---|
| Non-current liabilities | - | 229 | 614 | 500 | 333 | 265 |
|---|
| Lease liabilities | - | 15 | 9 | 6 | 3 | - |
|---|
| Retirement benefit liability | - | 2 | 4 | 5 | 7 | 6 |
|---|
| Non-current liabilities | - | 229 | 614 | 500 | 333 | 265 |
|---|
| Liabilities | - | 682 | 1,080 | 1,062 | 958 | 865 |
|---|
| Share capital | - | 135 | 135 | 392 | 409 | 410 |
|---|
| Capital surplus | - | 87 | 87 | 344 | 361 | 362 |
|---|
| Capital surplus | - | 87 | 87 | 344 | 361 | 362 |
|---|
| Retained earnings | - | -86 | -23 | 173 | 419 | 618 |
|---|
| Retained earnings | - | -86 | -23 | 173 | 419 | 618 |
|---|
| Treasury shares | - | - | - | - | -0 | -0 |
|---|
| Shareholders' equity | - | 136 | 199 | 909 | 1,190 | 1,390 |
|---|
| Net assets | 138 | 136 | 196 | 911 | 1,193 | 1,398 |
|---|
| Foreign currency translation adjustment | - | 0 | -3 | 2 | 3 | 7 |
|---|
| Valuation and translation adjustments | - | 0 | -3 | 2 | 3 | 7 |
|---|
| Net assets | 138 | 136 | 196 | 911 | 1,193 | 1,398 |
|---|
| Liabilities and net assets | - | 818 | 1,276 | 1,973 | 2,152 | 2,263 |
|---|